where do I get a battery for my car and how much should I pay

About 120 for the battery. You can get it for this price and maybe a little better at Sears or Wal-Mart or maybe autozone.

buy a good battery. most any parts store will carry it approx 135.00

actually Wal-mart does not carry this battery, it is a group 101 type. Autoparts stores carry this type runs about $180, but you can also get it for $165 @ batteriesplus