Can I get a good PR rank by displaying Google AdSense on my website NO!

Can I get a good PR rank by displaying ALL good high PR on my website for example, all website like PR2, PR3 and so on ... NO!

PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be. Also, the importance of the page that is casting the vote determines how important the vote itself is. Google calculates a page's importance from the votes cast for it. How important each vote is taken into account when a page's PageRank is calculated.
PageRank is Google's way of deciding a page's importance. It matters because it is one of the factors that determines a page's ranking in the search results. It isn't the only factor that Google uses to rank pages, but it is an important one.

Notes:
Not all links are counted by Google. For instance, they filter out links from known link farms. Some links can cause a site to be penalized by Google. They rightly figure that webmasters cannot control which sites link to their sites, but they can control which sites they link out to. For this reason, links into a site cannot harm the site, but links from a site can be harmful if they link to penalized sites. So be careful which sites you link to. Buying Links can be also harmful click here for detail.  If a site has PR0, it is usually a penalty or the website is new, and it would be unwise to link to it if has been penalized. Click here to if the website has been banned by Google before you link to it (There is nothing wrong to link to a new website that has a PR0 if, has not been banned or spamming.). It's also unwise to link to link farms. To check the website for spamming click here.

A page "votes" an amount of PageRank onto each page that it links to. The amount of PageRank that it has to vote with is a little less than its own PageRank value (its own value * 0.85). This value is shared equally between all the pages that it links to.

From this, we could conclude that a link from a page with PR4 and 5 outbound links is worth more than a link from a page with PR8 and 100 outbound links. The PageRank of a page that links to yours is important but the number of links on that page is also important. The more links there are on a page, the less PageRank value your page will receive from it.

If the PageRank value differences between PR1, PR2,.....PR10 were equal then that conclusion would hold up, but many people believe that the values between PR1 and PR10 (the maximum) are set on a logarithmic scale, and there is very good reason for believing it. Nobody outside Google knows for sure one way or the other, but the chances are high that the scale is logarithmic, or similar. If so, it means that it takes a lot more additional PageRank for a page to move up to the next PageRank level that it did to move up from the previous PageRank level. The result is that it reverses the previous conclusion, so that a link from a PR8 page that has lots of outbound links is worth more than a link from a PR4 page that has only a few outbound links.

Whichever scale Google uses, we can be sure of one thing. A link from another site increases our site's PageRank. Just remember to avoid links from link farms.

Note that when a page votes its PageRank value to other pages, its own PageRank is not reduced by the value that it is voting. The page doing the voting doesn't give away its PageRank and end up with nothing. It isn't a transfer of PageRank. It is simply a vote according to the page's PageRank value. It's like a shareholders meeting where each shareholder votes according to the number of shares held, but the shares themselves aren't given away.

Even so, pages do lose some PageRank indirectly, as we'll see later.

One thing to bear in mind is that the results we get from the calculations are proportions. The figures must then be set against a scale (known only to Google) to arrive at each page's actual PageRank. Even so, we can use the calculations to channel the PageRank within a site around its pages so that certain pages receive a higher proportion of it than others.

Building Quality backlinks is one of the most important factors in Search Engine Optimization.
It is not enough just to have a lot of backlinks, it is the Quality of backlinks along with the Quantity that help you rank better in Search Engines.
 

A backlink could be considered as a Quality Backlink if
1. The Theme of the backlinking website is the same as your website.
2. It links to your website with the keyword (keyphrase) that you are trying to optimize for.

This tools searches for websites of the theme you specify that contain keyphrases like "Add link", "Add site", "Add URL", "Add URL", "Submit URL", "Add Article" etc. Most of the results could be quality potential backlinks. Backlink Builder

Backlinks are incoming links to a website or web page. The number of backlinks is an indication of the popularity or importance of that website or page. In basic link terminology, a backlink is any link received by a web node (web page, directory, website, or top level domain) from another web node (Björneborn and Ingwersen, 2004). Backlinks are also called incoming links, inbound links, inlinks, and inward links.

Search engines often use the number of backlinks that a website has as one of the factors for determining that website's search engine ranking. For example, Google's PageRank algorithm uses backlinks to help determine a site's rank. To see a site's PageRank, you need to use the Google Toolbar for Microsoft's Internet Explorer or Mozilla Firefox, view the bar graph indicating a website's PageRank in Google's directory, or download the PageRank plugin for Mozilla Firefox.

Importance of Backlinks
This article will explain to you what a backlink is, why they are important, and what you can do to help gain them while avoiding getting into trouble with the Search Engines.