Most torrenting sites do not require passwords at all. And same with the actual software that you would download for torrenting.
I recommend BitTorrent, or µTorrent for applications, and Kickass, or The Pirate Bay for downloading the torrent. I already checked and both sites have multiple copies (with multiple qualities). Just open the .torrent with the respective program and give it 10 mins-3 hours depending on your internet, and don't forget to microwave the popcorn.