Dear friend welcome to the world of Lexus. 1st Prob, the paint... I have a 97 sc300 and it started on the bumpers and now is on the hood and roof of my car, I think with that red the chipping is normal wear(as I have the same color). A bra will cover it up now but the rest of the paint will surely follow. 2nd prob, the leather in the back will split there, more worn items. WWW.Leatherseats.com sells awesome replacement seats for about 750, includes both buckets, the rear and the center console leather. The third problem again some normal weather wear, you can have the weather stripping put on pretty inexpensively. What year is your car?? 4th prob, hmmm there are several screws along the botom part of the door panel(inside of course) and the top right by the mirror, and a hidden one behind the handle. after those are removed it pops out pretty easily. and the cable might be loose to the door, easy fix, hopefully. 5th yeah it could be a number of things, maybe bad plugs or wires, distributor cap and rotor might need replacing, fuel lines cleaned and filter changed. That one is hard to narrow down Well hope some of this helps lemme know how it goes!!!