So your a little new to pc's and don't know how to download these .torrent files that everyone is talking about?
Here's a lil info from http://websearch.about.com/od/torrentsearch/a/whatisatorrent.htm regarding the basics of torrent files and how they work.
My favorite torrent client is Utorrent, which can be picked up here http://download.cnet.com/uTorrent/3000-2196_4-10528327.html?tag=mncol;1.
For more advanced features of this program you can view here for opening ports if you own a router and setting up download locations (I recommend this)http://www.utorrent.com/documentation/connection-setup
Now for an great torrent search engine I recommend using http://thepiratebay.org/ or http://www.torrentz.com/. Also people will begin to tell you about private trackers and how they work, Just take a look http://en.wikipedia.org/wiki/BitTorrent_tracker as wikipedia explains it all in great length.
Whenever using a torrent site or engine please remember these are all user uploaded and can contain virus's or spyware so WHENEVER POSSIBLE READ THE COMMENTS BELOW THE TORRENTS. The longer you use it and get familiar with it you will notice some regular names will re-occur with great quality downloads.
Keep in mind that sometimes you will download a file and your computer will not know what it is or how to open them, don't give up you didn't get a bad file just your computer doesn't know how to assosiate with it because the file extension isn't archived. (picture.jpg or movie.mpeg) Jpg and mpeg are the file extensions for those type of files. So sometimes when you download a movie or application you will files that end in .rar or .iso just do a quick google of your file extension and voila! You have just figured out what type of file it is and what application you will need to open it.
PS. YOU SHOULD NEVER DOWNLOAD ILLEGAL OR COPYRIGHTED MATERIAL EVER!!!! :)