Stock Exchange??? How do I invest?

[john]

How do I invest in the Stock Exchange?
How much is the minimum investment possible?
Is there an age requirement in investing? Because I'm just 16.
How exactly am I suppose to buy and sell stocks/shares? Who do I approach? How am I suppose to invest?
What should I wear if I'm going to the Stock exchange?
Let's say I've bought and sold shares and I've gained money, how exactly am I going to receive the money? Do I need a bank account? Do I get a check or something?

I'm a 16 year old high school student and I've got a couple of hundred dollars lying around which I don't how I'm going to spend, I don't want to just waste it on stuff I don't need. Soo, I'm thinking of maybe investing it in the Stock exchange. Am I qualified to do so? With my age, with only a couple of hundred dollars, and without a bank account. If I am, please tell me how.
Keep in mind that I'm a newbie here, so tell me everything that I need to known on how to invest in the Stock Exchange.