That can be fixed with a good texture, but yes, I also find the rims a little flat. However, my concern is more directed at the front end which is too flat. This together with fixing the headlight's shape should make it look much better Keep it up.
what place exactly on the headlight needs to be changed? i have looked on the attached pic and compare with my, but still dont know, whats wrong with it
and for the rims, i have used only one pic
The headlights look much better now! The roundness of the front is better also, but it could still be a slight bit more rounded.
As for the headlights and rearlights... for the headlights, I'd say make them semi-3d, i.e. just extrude them in, slap a nice texture on that and put a nice glass texture on the headlight cover. For the rearlights I'd just use a texture.