There was an update for the ipod touch about 7 months ago and it allowed you to change the background on your ipod and you can also change the lock screen
settings/wallpapers
you go to menu and stuff
To change the background on an iPod touch, navigate to pictures and click on the picture you would like as your background. There will be an arrow coming from the box, click on that and select make background. You can also download various themes which include backgrounds as well.
Free games, apps, music, and you can change the background and app style
You have to settings and choose a backround u want.
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 ...
you go to your pictures and select the picture that you want and in the bottom left of the screen there is a little icon and you tap it and select set as background.
u cant download the background music for the ipod because its only the background music no one would ever think to put it on the ipod and i do agree the background music is cool
go to settinfs/wallpapers there you can choose between some of the factory wallpapers or some picture
If you jailbreak you ipod you can get paid apps for free and no it is not legal.
you cant