Thanks for asking those questions, I'm going to answer the questions in the same order you asked them.
-We'll be using, Microsoft Visual Studio C#, Microsoft Visual Basic, Notepad++, Construct 2, Code::Blocks and a few other stuff to make our products and the languages we'll be using will mainly be C++, C, C#, .NET, Batch, ActionScript3, maybe some Java, and some other languages.
-We'll probably be making money from some of the products we make, if we feel they need to be priced. And maybe some advertisements on the site and stuff like that.
-I'm 13 years old with 3 years of experiences, I've been programming sense I was 10 and started making companies sense I was around 11 or 12.
-And you'll need some experiences in the position you pick. at least a few months. Hopefully at least a year of experiences, or somewhat close to a year. If you want to be programmer, you should probably know some of the languages I list above.
If you apply, I wish you good luck!