That's not a hard issue, first You have to Download torch, if u haven't download it, download here http://download.cnet.com/Torch-Browser/3000-2356_4-75740051.html
Second download the torrent File You wish, torrent files are like these http://thepiratebay.se/torrent/3804496/
when you have downloaded ur torrent file, locate it and then right click-----open with-------locate Torch program and select it. i think torch will ask u where to save the file and then begin downloading, i'm using utorrent so i don't know how it goes on torch. If the torrent file doesn't start downloading then the torrent is corrupt and not the client, remove the torrent and download another one. That's it, And i recommend u another Torrent client better than Torch here http://www.utorrent.com/downloads
or here http://en.kioskea.net/download/download-74-utorrent