1. Drive down to the auto parts store.
2. Buy a Haynes or Chilton's guide.
3. Read it.
4. Then ask any remaining questions.

Seriously, these books are popular for a reason. They have some good info in there! There's no substitute for RTFM.

I also tend to own a factory service manual for my vehicles, as well. Especially useful for their troubleshooting checklists. Helps you avoid jumping to conclusions and swapping part$ for no good reason. -scott