Karding: Don't you just love WAUD hehe.

C#*RD:

1) Glass, you need a glass and aluminum polish with a lot of elbow grease. Paint, depends on how deep it is. Machine buffing might be necessary.
2) Please do a search on this topic. There's a long thread called The Detailing Thread that covered that in great detail.
3) Any good wax will do, the difference is quite small depending on your paint's condition. If you have a light colored car, use a cleaner wax every 2 weeks or so, then maintain with a standalone wax. I don't usually recommend brands specificaly since every color/situation may require a certain product. Can't go wrong with good brands.