if the cars ticking over, you will be able to see the cam belt trying to move, its on the left hand side of the engine, runs up the side
wouldnt try and start it too many times, just incase it has slipped,
coil packs im unsure of, but there under the engine cover (snaps off) and at the back of the plastic oil cover housing
best bet is check the cam belt, if not find some one with vag com...