I would check window relay or switch for culprit. If it is window motor... if you slam the door while pressing up and works, then your motor is on the way out.
I got BMW 3 pieces 7 spokes 17" for sale... $1400. Direct fit.
As for wheels you see, they are direct fit... some requires hubcentric spacer because they were designed to fit E39... which has bigger hub. As for bolt, use your original bolt... most of time, the wheels also come with a set of bolts.