Sounds like you have a hot wet mess based on your description of your brakes.
My opinion is that you only have 2 choices.
1) Take the vehicle to a reputable brake shop and let them diagnose everything and make appropriate repairs.
2) Replace ALL of the brake components yourself. This is what I generally do with older vehicles. Nickle and diming brake systems is a false economy, and dicey if you are new to brake work. Peace of mind is priceless.
Carl
