what do i need to buy to put new brakes in?

Unless you have a physical limitation, power brakes are not necessary on an A-body. It adds nothing to stopping power. You definitely need a new MC.
Do you have 4 wheel drums or front discs? If you're not sure pictures of a front brake with the wheel off would help identify what you have. If you don't know the difference, you may not want to tackle the rebuild. Be aware that your car probably has left hand thread lug nuts on the driver side.

Meanwhile, you can check out Rockauto for info.