Here is a translation:
BMW 750iL, bought it seven years ago in order to rebuild it. Unfortunately, I didn't have the time. I never drove the car. Transmission is defective, going backwards is no problem, forwards only when the oil is cold. The oil has been changed. Engine starts up fine, but does not run on all cylinders. No ELM error. Was parked for seven years. The car should have auxiliary heating and heated seats, but that was never tested. Suspension leveling front and rear. Cannot find the "Fahrzeugausweis". Battery is defective. Windshield has a crack. Tires have no tread left. Has be recharged for sure. Please have a look at the vehicle in order to prevent misunderstandings.
Since I'm not familiar with registering a car in Switzerland, I am not sure how to exactly translate "Fahrzeugausweis." It's some sort of registration document or the title to the vehicle.
Have you seen the car? How are the body and the interior? All the mechanical issues listed (Is that a complete list or just what the seller remembers from seven years ago?) can certainly be fixed, that's just a question of money. But whether it's too much of a hassle depends on a lot of factors. Is the car worth to be preserved? What is you financial situation? Is your objective to revive a beautiful E32 and keep it long term or are you trying to flip it and make some profit? The latter will most probably not work.
Good luck with this project!