You need to jailbreak your iPod Touch to change the background behind the apps on your iPod Touch. You can only jailbreak your ipod with windows.. not mac .
then download Cydia and Winterboard , you need BOTH.
It's kinda hard to figure it out at first but then you get used to it ...
It seem uncertainly for you 8gb itouch can hold apps programs.
It depends on what you mean by clone? If it is not an itouch, then you will not be able to use the apple apps.
Yes, that iTouch might not be compatible with all your apps.
iTunes!
yes
can have about 60 apps in half a gigabyte
not on the screen behind icons but on the one when u turn it on oh yeah you can by going to settings wallpaper
jailbreak it, then download winterboard from cydia and you can use any image you like behind your apps on mainscreen.
go away
apps from an itouch, iphone, or ipad can very. check the app store to see all the apps
they are two different things! an itouch is basically everything that the iphone is without the phone. you can also install most of the apps that you can on an iphone on an itouch
Can you be more detailed in your question?