It's kind of against the rules to request illegal content, but I'm sure there's nothing wrong with explaining how to setup torrents and how they work. It's up to you to decide what you want to download.
What operating system are you using? I'll assume Windows, in which case I'd recommend uTorrent. Most of the default settings should be ok. For Linux I prefer Deluge.
For torrents to work optimally, you need to set up port forwarding. This is basically telling your router to send all traffic from a certain port to your PC. The easiest way to do this is to set a static IP then go into your router and set up a port forward to your IP address. There are plenty of guides on how to do this but if you need specific instructions then just ask. You need to make sure the corresponding port is set in uTorrent. From uTorrent you can test whether the port is open. Torrents will work without this, but very slowly.
Then it's just a matter of searching for what you want on a reliable torrent site; probably the two most used are piratebay and mininova. You download the .torrent file, which contains information on what the files are and where to get them. uTorrent will do the rest.
It's also worth configuring the network settings like maximum connections, upload slots etc. This really depends on your connection though - what is your internet connection like (upload/download speeds etc)?
You might also want to look into some IP blocking software. This software basically refuses connections to known bad addresses (MPAA, Microsoft, etc). For Windows the most popular is PeerGuardian. If you're using Deluge on Linux, you can download the blocklist and import it into Deluge.
For an overview on the torrent protocol, including how and why it works, check out
http://dessent.net/btfaq/
ETA: If you like torrents, you may considering gaining access to some private tracker sites. These sites offer torrents that no-one else does, and are usually very reliable. In fact, if something is unavailable on Usenet, I'll always use a private tracker first before a public one. Be aware that your sharing is counted, so you can't just download all the time without uploading. It's a good idea to ensure that you're sharing at least as much as you download. I have my server torrent client configured to pause at a share ratio of 1, which means that I'm always sharing as much as I download. If it's a rare torrent or I particularly appreciate it, I'll upload to a ratio of 2 or 3. Probably the most well known of these sites is Demonoid. Generally they are invite only so you'll have to know someone who is already a member, or wait until registrations are open. There are several websites which track when registrations are open - if you can get a membership, I recommend you take it!
