Do you have another computer?
If so, remove the HD from the Toshiba and put it in a bay in the of the other computer. When you run the other computer, copy system files from it and place them in a folder on the computer. Then, delete all the data on the HD. Finally, copy the files BACK to the HD, put it back in the laptop, and boot!
( )) ))) CRAYOLA PENCILS! ))) ))) ))>