You just broke it. There isn't much that happens, but if you aren't under the warranty, you won't get a repair for free.
No. It is possible to break an iPod Touch but really difficult.
No, your ipod will not break. You simply charge it and re-do the jailbreak. no and you don't need to re- jailbreak it
Yes
No.
If you end up dropping an iPod Touch on a hard surface (like wood flooring or concrete), then the iPod Touch has a very likely possibility of breaking (this is if you drop it from about 2-3 feet off of the ground). If you take care of it, the iPod Touch isn't that hard to break. If you buy the silicon cases for the iPod Touch, then it is less likely to break as the silicon cushions some of the iPod's fall.
DON'T
no you have to download software on youre computer.
Around August
99c
it gets better
... nothing
When you sync a iPod touch it backs up your iPod and it can download all the songs on your computer (if you choose that option when you go to you iPod setting in music on your computer) :)