My computer has just been reformatted. Is there any way to recover my iTunes library?

-My mother - presumably without realizing it completed wiped our hard drive on our computer without copying my iTunes library. So I'm just wondering if there is any way to copy all my music and apps (I have the newest gen iPod touch) from my iPod INTO a clean library? Or do I have to start from scratch with everything? If this is the case, are all the apps and music I've purchased just gone or does iTunes have a way of knowing which things I've purchased? Please help! I'm kinda freaking out lolOh yeah it's no sweat! you just have to make sure your settings are set to "Show Hidden Folders" in your preferences and then you go to start/computer/ipod then its something like "(Names) Ipod" then you can go into your music folder and then copy paste it to your desktop and then copy those folders to your itunes, careful though, the actual name of the songs won't be there, itll say somthing like Song name "AIUHF" artist "none" because itunes encrypts the files for some odd reason

Check out this link for further Assisstance: http://lifehacker.com/105256/how-to-copy-songs-from-your-ipod-to-your-pc
no you have to start from scratch