The minimum age for someone to apply to get an automobile driver's license varies. Different governments have their own requirements. Even within a country the age and type of license can vary. So, for instance in some states within the U.S.A. allow you to get a license at age 16, but that license is restricted to certain hours of the day or other restrictions. Wikipedia  has a list for all 50 states.
The variations are generally between 16 to 18 years old.
(There are other restrictions on who can get a license besides age. Licenses to drive other kinds of vehicles like motorcycles or trucks may have a different set of requirements.)