Mini Cooper S – 2014 Decision support

Good evening together, I would like to read a few opinions about an ad that I am interested in. And would be very grateful if you shared your experience with me! The link to the ad:https://www.ebay-kleinanzeigen.de/…/2046632442-216-15340 The damage to the car, in my opinion, are only cosmetic mistakes, they will not cost the world either. Will, if it comes to a purchase, of course. I am currently looking for a new car, has half a year ago, an Audi A3 2.0 TFSI was built in 2006. Due to the age, problems (oil loss, steering chain, camshafts..) began to occur. This was already sold. Now I have read in a few forums that the Mini Cooper S can also occur the oil loss. Is it really so? The seller has already informed me that one should fill up all 2000km 1 liter of oil?? The seller has said that it is normal with the Cooper S, since it is a strong engine? ! What problems could still appear? I have unfortunately no idea of the mini. On what should I pay attention to most? Would I be very happy about helpful answers! Thank you schonmal.