The car looks good. When you are taking shots of your car there are a few things to keep in mind. Try to avoid things growing out of the hood/roof of your car. 1,3,7,8 and 10 all have a pole or road sign directly behind the car which draws the focus and can cause a bad reflection on the car. Best ways to fix this are to move the car or move your feet. You did this yourself in picture 5. 5 has great composition and no glaring flaws. However, I think it would have been even better later in the day when the light improved. The last hour or so before sun set is ideal time to shoot.
For the car, maybe just some tire shine for the tires and the front lip. I do mine all the time and really notice a difference.