Hello, How to clear bios password on toshiba satellite L755
More aboutclear password
Take out your CMOS battery and leave it out for about 15mins then put it back in a boot the machine. This should reset your BIOS to default and remove any set password.
We can't verify you're the owner of that system, therefore we can not give advise about password by-passing. Try contacting Toshiba directly or the laptop's vendor and be prepared to show proof of ownership. Good luck.