How can I restore my music to my itunes media folder?

Question

I added windows 7 to my computer and I had to redownload itunes when I did i went to put the songs back on my ipod and it couldn't find the files in the media folder

Answer 1

So installing Windows 7 erased all of your user data?  I guess the iTunes folder you have now must be from reinstalling iTunes.  However,
I tried to copy all the song showing up in my iTunes libraray
I don't understand why and how the names of all of your old songs are still showing up in your iTunes library, if your user data was erased.  That means the iTunes Library.xml file from before is still there, in the iTunes folder, even if the actual song files have disappeared (or are no longer where they used to be).
Maybe they got moved...  Try noting the name of one of the songs you previous had in your iTunes folder, or the name of an artist or album.  Use Windows to search your hard drive volume on that name.  If you were using the default settings for iTunes, the song files should have been saved as the name of the songs in folders that are the names of the artists and albums.  If a general search shows those files or folders, you may have found where ALL of your songs got moved.
Songs purchased from the iTunes Store can be re-downloaded from the iTunes Store by logging into your iTunes Store account and going to the Purchased screen.  You can also transfer songs purchased by you from the iTunes Store, from iPod to computer (the command is in the menu bar under iTunes).  You cannot transfer other songs files from iPod to computer using iTunes, but there are third-party methods and utilities that will allow transfer from iPod to computer.  If you do a Google search on something like "ipod transfer," you should get some links.