Yes, if you plan to ride it. Most State laws require the rider to also obtain the Insurance. For more information and resources on Motorcycle Insurance, check out http://www.findinsurance.us/motorcycle/motorcycle-home.html
Is the CAR insured? If not, it's not legal.
If you are riding on a motorcycle, you should be paying attention to the car in front of you. If you look at your GPS, you could crash into the car or something else.
If he is the registered keeper and owner of the bike that makes things more difficult, although if he signs over the documents to say that you are the registered keeper of the bike then the insurance company should be fine with it, and by endorsements o you mean from previous insurers and not an endorsed license with points?
Depends on what state you're in.
Yes
that depends on their insurance policy
Yes it can.
Not one of your own-generally you are insured by the owner's policy if you are using someone else's car (with permission)
no it is not parents have to teach you or someone else.
i believe youd be arrested for Grand Theft Auto
The vehicle is insured not the individual. You can pay for and obtain the insurance in the name of the owner with you listed as an insured operator.
The car is insured not the driver however many policies have restrictions as to who may drive the insured vehicle.