yes they will
You need to modify the mk4 steering wheel to fit. Get the 3.5 cabrio wheel. It looks similar and no mods required
maybe
With adapters yes. Stock no. buy addapters and you can get them to fit.
Yes, a starter motor from a 1.6 will fit a 1.8 and vice versa.
yes I belive so
Most if not all 4 cylinder VAG engines will fit in a mk2 Golf. However it will be much cheaper to buy a GTI rather than convert a non-GTI model once you factor in ancillary items such as GTI-spec front brakes, rear discs, a change of wiring loom, etc.
yes
Yes, I have it done on mine. The MK3 2.0 gearbox fails when it gets to high mileage. The Mk2 1.8 gearbox is bulletproof.
the ceiling wouldn't fit because it would be a little too big, if you meant the actual glass sunroof it will definitely fit any mk3 model including jetta/golf/gti for sure.
The 1994 VW Golf GTI takes a 21" driver side, 19" passenger side. and a 13" rear.
yes...but you have to change and modify a few engine mounts and so on. And modify or change the whole el-wiring in the car