The requirements to make a vehicle "street legal" and eligible for registration, are contained in every state's motor vehicle codes. Contact your local DMV agency.
It depends on where you are. Here in Colorado - you can make a 2008 model street legal.
Quads are not street legal, and nothing you can do will make it street legal. It is illegal to drive a quad on any highway, period.
Generally golf carts are not street legal. In order to make them street legal, you need to update it to make it regulation. Also, you need a warning label that states you cannot go above a certain speed limit.
Yes, you can.
yes
Contact your local DMV agency they will have information or a manual that details all the items necessary to make a motorcycle street legal.
Yes, the motorcycle is not street legal and they did not make many
buy a car
You can't
You can visit your local motor vehicle department and request the information that gives you all the requirements needed to make a composite vehicle street legal.
http://www.broadbandreports.com/forum/r20382535-Motorcycle-VIN-2-stroke-street-legal-questions