lol i wouldn't worry about meshsmoothing just yet, if anything i suggest you use turbosmooth unless you wish to go on into NURMS modeling, which is kinda like poly modeling.. but spline modeling at same time.. its confusing
but ya, architecture material has a preset glass, its not the greatest, but its a start
as for tires, all i can say is that its hard, try a regular standard phong material with a specular of 20 and gloss of 5, and make sure you put a touch of brown in there, i cant remember my settings on the Z4 coupe, but i think they were somewhere around there