Target's are now welded metal baskets with hanging chains, and the disc's thrown are specific to the game. All you need is one to play, but players often carry 10 to 20 disc's, all with different flight characteristics and weights.
The game is rather simple, throw a disc (frisbee-type thingy) into the basket (a pole with chains and a wire basket).
There are many different types of discs for many different types of throws. Courses can vary greatly, from wide-open flat courses to heavily wooded areas, to areas wrought with water hazards and areas with large hills and sudden drop-offs.
Disc Golf is also loosely termed "off-road golf" as the courses tend to be a lot harder than ball golf courses, in terms of the fairways and the rough.
Eric: Hey bro, wanna shoot some discs today?
Tom: Sure bro, but don't forget the visine this time.