You need to re-install all the software you had on there from your disks, you can use Recuva to try to get your data back. Do that first before doing anything else though. Did you actually format the drive or just re-install Windows over your existing installations? If you just re-installed windows in the same directory your files should be there, do a search on the hard-drive for them.
If you used a restore disk, you clicked Next a bit too fast without reading the warnings about data loss.