For something like a torrent reader, you will have to use an external library called libcurl. Interfacing with the web is a little more difficult than you might think I would start with local stuff that you have complete control of. Maybe local txt, conf, csv files to start with.

First thing that you need is a good IDE. Google XCode and you'll find it, XCode is by a wide margin the best IDE. You might have to register as a developer with Apple, but it's free, and they won't spam you.