That ^ won't do it, not a driver issue, it's trying to boot to PXE from the network card since it can't find another boot device.
Go into the BIOS, and check if the hard-drive is listed as a device. If it is, go into the boot options and make sure it's listed in the boot order, add it if it's not. If the drive is not seen, reseat it in the laptop. Try again.
If it's not seen then, you may need to buy a new hard-drive to try, and contact toshiba to get a restore disk set. If the laptop is in warranty they'll probably just send you a new drive that's pre-loaded with the OS.