fix the existing problems first (there will be some) then put your own stamp on it.
beware of previous bodges modifications and look for hidden rust (t4's rust for fun)
as previously mentioned re. wheels, also check the wheel-bolts are long enough (seriously!) as standard 'steel' wheel bolts are usuallytoo short for aftermarket alloys and also the bolt's 'seat' can differ to that on the wheel with possible loosening while driving