iTunes backup files

Unless you have additional files in the form of .mp3, .m4a or .m4p, all you have is the Library database file from that time-period.

The ITL file contains some data about the music you had at that time (Ratings, Play Counts, Last Played, Playlists), not the actual music files that can be played.

Do you have any other files around?

Unfortunately not. It is very similar to the ITL file.
See: What are the iTunes Library files?

Do you have any music files on the PC or on backups?

If not on the PC (did you do a search?), or on a backup medium, then your songs are gone.

Perhaps you have them on an iPod? They can be recovered from there....

on this same subject...if I'm getting a new computer without access to my library of songs on my old computer will i be able to reinstate my library of songs onto my new computer with only the use of my ipod?? i don't want to lose my songs....thanks!

And for all those who are wondering.....

These links will give you several methods of recovering whatever songs remain on your iPod; some free, some third-party software, some more comprehensive for restoring Playlists, Ratings, Play Counts, etc. Read them and their associated links before deciding on a strategy that works for you. There are many various third-party software programs that will offer a more robust process, or an easier GUI. Do a Google search for them if the links below leave you wanting…
Don King Resurrected: Deleted files from hard drive (free user steps – music recovery only)
MacMuse: Computer Crashed (free user steps – music recovery only)
Copying music from iPod to computer (a primer on various methods and software)
Copying Songs from Your iPod to a Mac or PC (resource for 3rd party software)
iPodRip Software
PodUtil Software
Senuti (Mac OS X v10.3 or higher Recovery Utility)
XPlay (Windows software For Music Recovery &/or Cross-Platform Functionality)
XPlay Photo Browser (For recovering Photos)

Extremely Simple Method: (just to recover the song files – may not work on a Mac)
1 - Open iTunes
2 - Edit=>Preferences=>’Advanced/General’ tab
2a --- Select ‘Copy files to iTunes Music folder when adding to library’: checked
2b --- Select ‘Keep iTunes Music folder organized’: checked
2c --- Click OK to store changes
3 - Attach your iPod to the PC and hold down the ‘Shift+Ctrl’ keys until the iPod is fully recognized (this will defeat the auto-sync process)
4 - If you get a dialog box to link the Library, decline this option
5 – Within iTunes: File=>Add Folder
6 - Browse to and open ‘My Computer’ (click on the ‘+’) and select the iPod
7 - Click OK
8 - The music files should start to transfer back into iTunes
8a –- this will take some time depending on your PC and the amount of songs on the iPod
No Playlists, or Ratings, Last Played, & Play Count attributes will be transferred from the iPod to iTunes using this method

After recovering your song files, strongly consider developing a thorough backup strategy for just this type of situation (and many other potential disasters).
You need at least two full sets of your music, not including what is on the iPod:
-- One full set on the PC within iTunes (on internal HD or ExHD)
-- One full set on an separate external backup medium (CD/DVD/ExHD/other)
-- One (full or partial) set on the iPod
Music files on just the iPod and only one other medium is not considered having any backup.

If you cannot store your complete music files on the computer’s internal HD, then create and maintain at least two external sets (any multiple combinations of ExHDs, DVDs, CDs).

Backup both the music files and the Library database file (iTunes Library.itl). What are the iTunes Library files?

Here is a post on developing a thorough backup strategy:
http://discussions.apple.com/click.jspa?searchID=-1&messageID=1498152