There are no laws governing dirt bikes, they are made to be ridden offroad. If you do put a dual sport kit on a dirt bike and get a tag, then all laws pertaining to street bikes apply to you. You might check this link: http://www.txdps.state.tx.us/msb/
Your Local DMV and Law enforcement office would be the better place to ask. That way you will not get "someone's option" of the law.
i don't know yet
Different states have different laws when it comes to dirt bikes. In California, you can ride a dirt bike at any age as long as it is not on the road.
yes, dirt bikes are motorized
Everybody that races dirt bikes "started" racing dirt bikes at some point.
dirt bikes in the past had less gears and power then dirt bikes have today
no dirt bikes arn't illegal
no there not dirt bike is better
The two main types of dirt bikes are motocross and trail bikes. Yamaha, Kawasaki, and Honda all make these types of dirt bikes.
dirt-biking is for dirt-bikes it can be either stunt or mud riding
There are a few dirt bikes that you can buy that are cheap. Some generic dirt bikes you can buy are 200 CC, Yamaha and you can have bikes shipped to you from China.