When powering on your laptop, press the F12 key about once a second until you get the boot menu. Then select the CD/DVD drive with the first of the restore discs. If, for some reason, that doesn't work; press F2 when powering on and go to the BIOS setup. Once there set the boot sequence to boot from the CD/DVD drive first. Hopefully that will get you going. If not, you can contact Toshiba and get them to send you a new set of restore discs.
When you've gotten your system back like you want it, I urge you to get yourself an external hard drive and a good 3rd party backup program. You can set it up to do everything automagically at the time and frequency of your choice. 1 TB external hard drives are about $70 these days and a really good FREE backup program is the Easeus Todo Backup Free which you can download from
http://www.todo-backup.com/products/home/free-backup-software.htm . That can save you a lot of time and frustration the next time something like this happens. Sooner or later it happens to all computers for one reason or another.
`
Good luck.
I thought I was over-writing my deleted files, but clicked the button to erase the entire computer. Lost everything, including Boot Manager. I made a complete system restore set of discs,(5)-but I have tried many times in different ways to get the computer to boot, and re-install Windows and all of Toshiba's software, but to no avail. Ihave a Windows 7- Toshiba laptop. Please help if you have the time. Fixed income make it difficult to have this done at a repair shop, as they are so expensive.
,

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic