Hi Cassava,
Car rental in
Barbados is a popular option and you can rent a in the capital city of Bridgetown from one of Barbados car rental companies.
Renting a car there is straight forward and all you require is a driver's license. The price range is between $20 to $50 per day and that depends on the vehicle model, etc.
Please visit the following link for more information:
car rental
Hope this helps
VacationBuddy