It all depends on how you expect to receive the data. If this is an interactive thing, just use raw_input
(with python 2.x) and then put them into queries using string formatting:
license_number = raw_input("please insert the vehicels license number: ")
car_type = raw_input("what car type? ")
# etc.
# validate inputs here.
# note that with python 2.x the variables will always be strings
# if using python 3.x, use input() instead of raw_input()
# put them into a query using string formatting
query = "INSERT INTO VEHICLE VALUES('%s','%s','%s','%s')" % (license_number, 'null', car_type, owner_name)
Of course, you're going to have to do all validation yourself, and also - remember to be secure (i.e., even with password protection, it's still a good idea to check the input for SQL injection).