the door cards on the rear wont
front one's would and seat will.
Wrong.
All 4 door cards are different. The front doors are longer on a 3dr than they are on a 5dr.
Front seats will fit, but as mentioned by Adam, they won't tilt forwards to allow access to the rear. This is fine if you don't carry rear seat passengers but I believe it is an MOT failure.
Rear seats will fit with no problems.