the one spring that is loose is supposed to be loose, its part of the advance graph. You cannot buy that spring separately as a part. however you can go to a shop that sells springs and show them your old one for a similar item, The weights should be free to pivot on their stalks and not flop around. They are two plastic pieces that are the actual bearings for the weights - dont lose or damage them.
The main shaft of the unit needs to be greased with regular wheel bearing grease so that it can spin freely. The air gap should be about 1.00mm (let me check my notes - which are buried at home) and the reluctor should not damaged in any way - DO NOT use emery paper anywhere in the distributor.
The vacuum breaker plate should move with a slight drag - its greased with silicone grease from the factory and you should not wash it with petrol etc.