In order to use KTorrent navigate to the Pardus start icon > Programs > Internet > KTorrent.
KTorrent is a BitTorrent client written in C++ for KDE using the Qt user interface toolkit. It is maintained in the KDE Extragear.
To download torrent files, use your web browser or inbuilt KTorrent search bar, to find a torrent of your choice on websites such as The Pirate Bay, Mininova, IsoHunt, or, best of all, you may use Demonoid without registration using Torrent. Most search engines will allow you to screen for the type of torrent you are looking for e.g. software/applications, music, films/movies etc. After performing the search, you will be listed a number of torrents which match your keywords, the search engine will also indicate the number of seeders and leechers the torrent has. If there are 0 seeders, that means the file is not being uploaded by anyone and it is unobtainable, the higher the number of seeders the better. Whilst the ratio between seeders and leechers is fairly important (as the leechers are using up the bandwidth of the seeders to download the torrent for themselves), keep in mind that you will be downloading from leechers (whatever they have downloaded that is) as well as seeders.
An alternative to using a torrent search engine is to use Google by typing the name of the torrent you're looking for (If downloading music, I reccomend searching the name of the artist as opposed to the name of the song, if albums/disocgraphies come up, simple unselect the songs you don't want as your are adding them to KTorrent) then using any one of the hundreds of torrent search engines that exist and have been indexed by Google.
An alternative to KTorrent that is available in the Pardus repositories is Transmission.