Hi Mary Ellen,
Restore disks are created for the specific machines they come with. I doubt that you could use the Toshiba's disks with the Dell machine unless the disks are specific software packages, such as if you had a disk for MS Word that came with the Toshiba.
As for the price of doing this type of work, I would suggest that you contact a place like CompUSA and see what they would charge. Is the Dell still under warranty?
Stores sometimes sell educational versions of Office at a lower price than the full version of the program. I know that the CompUSA in my area does. These versions aren't able to be upgraded to the next version of the software, but they work well otherwise.
Good Luck with your machine!