At the simplest level, they can't go in unless they pay.As far as how the money is used, it pays of:
There is no entrance fee to the Vatican. However, the museums do charge an admission.
The Smithsonian museums in Washington, D.C. are free to enter.
Some museums pay minimum wage. Others pay a salary based rate. It would depend on what museum you would work at and where the museum is. The bigger museums would more then likely pay salary based wages.
Yes, most museums in New York offer discounts to college students. They even have days where they allow you to enter for free.
The government pay through Taxes
A museum is where you can go see things of historical significance... although "significance" is vastly different for different people. Some small towns have museums about the history of the town, which is interesting to people who hold the town in some affection, and not so interesting to people who have never been there or who are trying to escape to a larger city. :) There are museums that have specific themes... art museums are common, for instance. There are also Railroad museums, Tractor museums, Doll museums, Military museums, and almost anything else you can name.
no you don't have to pay it's free to enter competitions.
No.
how many people do you have in you're family?if its 5 like i do it cost $40.00
Most museums that i know of do allow people to enter it for free you rarely find a museum that is not free entery the same with libarys but it depends on your area.
There are many different types of museums, including art museums, history museums, natural history museums, anthropological museums, tribal museums, children's museums, and science museums.
The National Gallery and the National Portrait Gallery on Trafalgar Square in London has a few famous paintings. There's also the Tate Britain and the Tate Modern. All of these museums are free to enter.