Registering a vehicle depends on where one lives. In the UK one can register a vehicle on the official government website by finding instruction on the vehicle registration section. They help one find a local DVLA office in order to complete a registration.
is this vehicle currently registered?
Your vehicle should be registered in the state you live in.
It would typically be registered as such, although some states might allow it to be registered as a passenger vehicle, rather than a truck.
What is the total no of registered motor vehicle in Mumbai up-to 2009?
As long as it is where the registered owner of the vehicle legally resides it is legal.
That depends on the country where the vehicle is registered and then perhaps the state of that country.
NO
yes you would
You would have to find out what state the vehicle was registered in (which you can do through services such as Carfax), then you would have to contact the Department of Motor Vehicles for the state the vehicle is registered in - however, this is no guarantee that the information wouldn't be confidential, and wouldn't require a court order for them to release it to you - you'll need to contact the appropriate DMV office for an answer on that.
The dolly needs to be registered, but the car does not.
Get it registered and pay for it or sell it.
how