i'd spray down all your brake fittings before you tackle tearing the system apart. Get some good white litium grease or PB blaster and spray:
The two fittings at the master cylinder
Where the front lines meet the rubber hoses
Where the rear line meets the rubber at the body
Where the hardlines meet the distribution block on the rear
and where the hardlines meet the rear wheel cylinders
If you are 'rebuilding the brake system' you want
Calipers, I went reman with no issues, come with pistons/seals
Caliper hardware kit (depending if you have pins or sliders)
Front pads
Front Rubber lines (went Raybestos)
New/Turned Front rotors, wheel bearings, seals
Rear rubber brake line (Raybestos)
Wheel cylinders
Drum Hardware/Spring kit (you'll need the two brake tools)
Brake shoes
New/Turned Brake Drums
Brake assembly grease, kinda like a vaseline consistancy
Master cylinder (and pushrod retaining grommet if manual brakes)
Brake booster w/check valve (if power brakes)