vehicle
texas
Yes.
Yes!
No, not in Texas or any other state.
No. You can only hold a license in one state - the state you reside in.
Varies by state.
A driver's license is not required to purchase a car in the state of Texas. A license is required in order to drive the car.
If you don't have, or do not qualify for, a state drivers license, the state also issues state identification cards. The requirement that you positively identify yourself with verifiable documentation as to who you really are still exists, but it should serve as an alternative picture-ID to the drivers license. As it is in most(all?) other states, you cannot possess BOTH a Texas drivers license and a Texas identification card at the same time - only one or the other.
If your drivers license is revoked in one state, can you get a drivers license in another state?
yesAdded: But if you reside in Texas, you MUST apply for a Texas license, you cannot continue driving on your old state's license.
Varies by state. Usually, a regular license, but which has a restriction of some form on it.
I believe that the requirements for a class B commercial drivers license varies from state to state. Your best bet would be to check in the state where you live and contact the DMV to find out what the requirements are and where you can go to fulfill those requirements.