welcome. your dad has given you a great oppurtunity. this is exactly how u do get experience.detailing the interior to a reasonable state should only take an hour. everybody else is more qualified thani for the rest of your questions so ill leave it with them.as for the radio code if u go to the dealer with your proof of ownership and vin # they should be able to find the code without taking it out. a good relation ship with a dealer is a good thing hit em up for whole sale prices as your young and new. dont be afriad to learn by doing it yourself. wish my dad had bought me bimmer