Yes, Jailbreaking is completely safe.
Because it is just a software mod, it can be restored using iTunes.
All Jailbreaking does is go into the phone and unlock everything that apple locked to keep you from getting everything free.
I recommend using the blackra1n program from blackra1n.com.
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.
It is up to you. No matter what you have on your ipod will become messed up when Jailbreaking...
By jailbreaking it.
No
no, it is not illegal
no
As of today (November 24th, 2010), jailbreaking an iPod Touch is not illegal. Is it 100% safe? No.