A vintage motorcycle is a motorcycle produced before a certain year. Motorcycles produced in the 1970's and years previous are considered "vintage". The best IMO are vintage British bikes, nothing beats a 1960's BSA or Triumph!
the markets fluctuate depending on trends and demand. For example, before the cafe resurgence 1970's hondas were bottom dollar, now a running one can pull a few grand depending on condition, etc......
You do not have to own a motorcycle to get a licence, but you will need to borrow a bike to take the road test unless you buy one in the meantime. Not only do you not need to own a motorcycle, but...