Free apps, free games. The only bad side is that it makes it about 10% slower.I hope I helped you! :)
no, but i woudnt try it
NO, it just breaks the warrenty with apple. Its just a 3rd party software
obviously, as you cannot get them w/o jailbreaking
Yes, jailbreaking does void the warranty.
"Jailbreaking" is another word hacking. Therefore you void your warranty but you get cydia, a jailbreaking software. Jailbreaking does have it advantages and Disadvantages. But if you want to send it to apple to repair it you have to restore it to factory settings to get back your warranty.
Yes; not jailbreaking it. If you mean a way to do the same thing as jailbreaking without actually doing so, there is no current way to do so.
Jailbreaking a phone is partially legal and partially illegal. I have a post regarding this http://www.techlucid.com/2013/11/is-jailbreaking-illegal-or-not/
It is impossible to get an installer on an iPod Touch without jailbreaking.
If it is an iTouch, iPod, etc, you cannot take it to an Apple store to get fixed, updated, etc. as they do not accept jailbroken devices.
It is up to you. No matter what you have on your ipod will become messed up when Jailbreaking...
no, it is not illegal