No.
If you jailbreak correctly, no, you keep all your songs on your ipod after jailbreaking.
No
No they won't . you will only GET cydia which is like the appstore except from other people
no. everything from your iPod will be erased, but your itunes will stay the same, so when you sync it again, everything will be on your iPod again
You probably erased the songs by accident
Yes, but the next time you sync your iPod with iTunes they will be erased from your iPod.
download them from loads of sites as usual, you dont need to jailbreak just to get free music
When the songs were erased from your Ipod, you can never get it back, maybe you have plugged in your iPod to other PC/laptop that has itunes. You should connect your iPod only to the PC where you have installed your own itunes.
If It is erased from the 3.53% chance from a Tethered JAILBREAK, it is impossible if you do not have cydia or another download source. -Anthony Zaleski
How to jailbreak my iPod touch
to jailbreak your iPod 4.1 go to greenpois0n.com
No. Your jailbreak will remain as it is. Syncing your iPod does not alter the jailbreak in any way.