The "car bodies"? professional class are made of carbon fiber. Slower classes can be fiberglass, aluminum or steel.
The "racing surface"? is usually a concrete "launch pad", staging area up to 60/100ft down the track, the rest is usually asphalt to save money. Some tracks are completely concrete, but this is rare.
no
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A Rail.
Air Intakes or hood scoop
nitro / methanol / petrol!
Anything motorized, it seems, thses days can be raced.
A tire with a tread has less contact with the road surface than one with no tread. When racing you want to maintain as must tire surface in contact with the racing surface as possible.
depends what drag racing your talking about cars ? bikes ? trucks ? my bike can go 169 mph at 8.88 seconds
some drivers drive their cars back while others are towed back by their crews
Drag racing illegaly.
Drag Racing as well as some forms of drift.
probably something like 330 mph - around that area