Firstly well done that's almost stealing them.
Now IMHO you need to inspect them carefully and to that you need to clean them first so you can see what you have under the grime especially in the middle where the discs run and the pads sit.
Brake dust builds up there and then with wet it eats into the alloy if left. So clean, if all OK then paint to make the look pretty

. Yes to new pads so you need new pins. The mounting bolts for the AP's are a bit longer I got mine from MGMania (ebay shop they have) I seem to recall. Check the cross over pipes and bleed nipples. Worth replacing IMHO.
Oh yes and it's not often mentioned but the AP's should really be cleaned a couple of times a year in use to keeop the dust build up problem at bay. This suggestion came from an AP main distributer BTW.
Edit:- Just a sugestion:-
Paint the discs bells and the outer rim to stop the rust that makes them look so ratty after a time in use. That's just caliper paint and it's still fine several thoausand miles later.