It depends what country (or state if in US) you live in. Each have their own laws regarding how old a person has to be before they can legally drive on the roads and that age can vary from 14 to 18.
You would be currently 23 at the time of answering - you would have your 24th birthday later this year (2015)
Depends what you want to drive http://www.direct.gov.uk/en/Motoring/DriverLicensing/WhatCanYouDriveAndYourObligations/DG_4022547 Lists all the ages for all the vehicles
1991
1991
1991 He was born August 17th, 1989 not in 1991.
1991. 1991.
1991
you will be born in 1991
Born in 1991
1991
1991
1991