Prostitute
In most cases, yes
A nurse is the most helpful job
which is the compensate job in the world
i think you mean "how" and it depends on the country. in most first world countries its about 14. but in other countries they have child labor.
Sitting idle is the most boring job in this world.
Doctor
to combined all the elements in the world will be the most expensive job in the world as in material things but for spiritual job the salvation of one soul will be counted as blessed for many are called but few are chosen
In most countries it is illegal for a person under 16 year old to have a full time job. This is to protect childhood and to protect children from exploitation. However, in many countries of the world, the international convention on exploiting children is ignored.
Pilot?
airlines pilot
Medical Examiner
you have to be 13 or older to have a paying job in most states.