Questions from a Newbie!

[Kittem]

Hi there! I'm pretty new to the site, and kinda browsed the forums but found no answer for my questions!

1) How do you change the text at the bottom of the page so it reads your site, instead of the default?

2) How do you have users upload an avatar? I know how to change it, but is it possible to have them upload one of their own, and for me to choose which file folder to install it into?

3) Does anyone have a script similar to Pokemon Safari? I would love to implement a sort of either throwing rocks, or trapping animals and having users get the chance for items or pets in the trap, kind of like hunting? XD

4) I'm also looking for a script kind of like a maze, IF that's even possible, kind of like a text based adventure with random outcomes? And/Or even just a place you could visit and click a button, and there would be a chance of getting an item/minipet.

5) Any way to change a member's username at all?

Thank you guys SO much in advance, and I apologize for all the questions! I just really want to understand this, and I'm studying PHP in the meantime. <3