he's in SA so to him it's probably a coupe, not that it's relevant to his issue
the VAG standard immobiliser system lets you start the car but after 1-3 seconds will cut the power, if it was the alarm then it would have the siren going off, the transponder box is under the dash to the side of the centre console, follow the wires attached to the ring on the ignition barrel, there should also be a chip in the key, the cjip, transponder ring and ECU all have to be part of the same family, if you have one of the items brothers or cousin then they won't mate together, no incest possible in the VW group lol