For my released app, I kinda cheated and used a program call GameSalad (Mac-only). It is more of a game creator than an IDE in that it doesn't require you to "code", but does use some scripting/expressions.
Apple ships its own IDE called xCode, which I have been slowly learning by reading a few different books. As far as online tutorials, I haven't done a whole lot of searching, so I'm guessing that Google could give you more than I could, which is nothing... ;-)
Also, there IS money in this! My start-up cost were about $1200, and I'm probably gonna clear that in my app's first week...