Transfer Switzerland to D or Spain

Hello together I would like to buy a car from Switzerland that has already been registered off and also no TÜV has (is ready to drive ) and to introduce it to Germany or to drive it right away to Spain. What do I need for this? Are there overpass registration marks in Switzerland or do I have to bring one from Germany? Since the car does not have a TÜV, can this become a problem for a overpass registration mark?