Just because your car came off an assembly line, that doesn’t mean its parts are inexpensive to replace. A replacement hood from a relatively run-of-the-mill sedan, for example, might cost hundreds of dollars, but try buying a replacement hood for a Dodge Viper without putting down thousands. The same goes for curbed wheels, paint finishes, and fenders and valances.
The Cheap Fix: Covering up the scratches and dents without going to a body shop, or ordering generic "direct fit" parts. There's also a variety of scratch removal products from 3M, Meguiars, and others, which you can buy at a Home Depot or AutoZone. If you go this route, there's a major downside: Doing it wrong can seriously mess up the paint and everyone will notice.