Q2 - Is a motorcycle and sidecar the same as a trike?
A2 - No, trikes are a specific vehicle category having symmetrically placed wheels. They have different licence and taxation requirements to motorcycles.
Q3 - Can I ride a sidecar outfit on my car license?
A3 - No, you cannot. All car drivers, regardless of when they took their car test, must pass a CBT before riding an outfit on the road. Remember as far as the DSA is concerned a motorcycle and sidecar is a motorcycle with an attachment not a car or a trike.
A4 - Can I ride a sidecar outfit of any size on the road with just a CBT?
Q4 - Many years ago you could, but the law has changed so now you will require the same licence as you would for a solo bike of the same size.