I'm not sure how'd you go about monitoring. I'd usually patch the outs to two powered monitors, or to an amp. Maybe you have a stereo you can use (though in the future you might want to change that, monitors are VERY important for proper mixing) until you get monitors or an amp for your headphones.
As for cables, you can either order them online or order parts and build them. Depends on what you feel like doing. Right now for you cables won't really make a difference, but if you can get either monster or mogami.