I will TRY to make the skin of these car

that car looks nice in that colour scheme.........:)

How hide the 3 leds behind number end what is the champ where these cars ran?

Seems to be the car from early 2006

http://www.racingsportscars.com/photo/2006/Istanbul-2006-04-09-037.jpg

As for leds, you've to erase them from the parts layer.

thanks