Sort your repairs then use 240grit or something to feather back the repair area. These areas want a good couple of coats of primer (1 light, coat 2-3 decent ones).

If the other areas are ok then you could probably just get away with flatting them, but if it's all pretty bad and you want to full prime the car then i'd go over the rest with 400.

Cover your repairs with a couple of coats then give the rest 2 full coats.

Primer wants to be 800 wet flatted. Then you can go on with basecoat or solid colour. Whatever you decide to use.

Obviously thats not going to get you the best job in the world but if you just want to tidy the car up as you say then it should be more than good enough.

HTH