(1) Check manual, may indicate what to do if you forget. - Look for "WARNING, if you forget, your hosed - must return to factory. Lost manual, go to tohibia and download.
(2) Contact toshiba support (did not see a chat window so would have to call.
What they may say:
(1) May require re-installing bios firmware. Since you can not get into BIOS you would need a dos/windows based updater. Safest way is always from Bios, but if not available must use alternative
(2) Try what henydiah suggest, BUT I don't think removing CMOS battery will help. Reason to call first. Password may be stored in nonvolatile memory. Remember you are "protecting the system" you do not want it to be easily circumvented.