If it is an app, press and hold until it wiggles. Then close it down by pressing x button. If u use safari to facebook, just logout
No, but you can get Facebook on an iPod touch or even an iPod.
Yes, restoring your iPod will take off the jailbreak, and you will have to jailbreak it again.
Yes, the iPod Touch has a free Facebook app.
You cannot put facebook on a nano, but you can put it on an iPod Touch.
Take a screenshot by clicking the home key and sleep at the same time, or you can try double tapping the picture.
no...
uncheck them in your itunes then sync your ipod. Then they should be on your itunes but not your ipod.
on Facebook? You can't.
You probably need the newer iPod to get on facebook or more memory.
The Facebook iPod Touch/iPhone app can be downloaded from the iTunes App Store.
Change your iTunes settings so that it won't sync pictures to the ipod, they should be taken off next time the ipod syncs.
Installing the free Facebook app (See links below) from the iTunes app store will put Facebook on an iPod Touch.