I have always been impressed that pilots can control aircraft's by operating the directional flight controls.
I don't really know much about flying planes. What type of schooling or training is required to be a pilot?
I am not sure, but I think it is 500 hours of flying so they can be safe.
How long does it take  in classroom time to get a basic license? Are there different levels?
Again I am not sure, I do know that you can do a pay to work program so you can operate an aircraft by paying for it.
Who oversees pilots, Is there an aagency?
The Us airline pilots association is the agent for the US airways, and they get involved when they need an agent.
Do you know anything about the requirements to be a steward or stewardess?
I do not, but they are not considered any type of aviator, so their training would be very specific.
Do most commercial pilots get training in the military?