NO, you can always restore your iDevice back to its original settings.
jailbreaking the ipod touch is legal. But if you use the tool that gives you all apps free it is illegal.
It is impossible to get an installer on an iPod Touch without jailbreaking.
It is up to you. No matter what you have on your ipod will become messed up when Jailbreaking...
You cannot get all apps for free without jailbreaking an iPod Touch. It is not possible.
no
you cant
No.
Yes, jailbreaking does void the warranty.
As of today (November 24th, 2010), jailbreaking an iPod Touch is not illegal. Is it 100% safe? No.
No, not without jailbreaking your iPod 2g.
no, but i woudnt try it