You cannot put themes on an iPod Touch without the jailbreak.
No. You must restore to Downgrade the Firmware!
You can't downgrade an IOS on your iPod Touch.
You can't downgrade IOS!
You can use a new jailbreak called "spirit jailbreak". Google it. alternativley you can downgrade your firmware to 3.1.2, then use Blackra1n.
the reason why it is not working because you probably have the new version of the firm which is 4.0.1.2 and for jailbreak me to work u need to be under 4.0 firm for your iPhone , or iPod s
Yes but you have to restore it
How to jailbreak my iPod touch
Not without erasing the jailbreak.
It depends on what software your ipod is running.
Impossible you need a computer no matter what
you need 4.0.1 to jailbreak it