Toshiba satellite L850 key for BIOS

As far as I know, you cannot reset the bios password of the Toshiba laptop just by removing the CMOS battery. You need to reset the contents of the flash EEPROM that stores several values like the password, serial number, MAC adress, OEM numbers. I don't believe that this is possible outside of a Toshiba workshop.

Toshiba ASP Support may give you the Response Code for free (with enough explanations on your side). See also toshiba bios password solution for Centrino/P4 laptops, maybe still be pertinent to your model as regarding the Response Code

_{If googling comes up with the website Laptop Rebirth, be advised that it does not work any more, so you would be wasting your money.}

After trying all the options on forums and the Toshiba site, I went through all the f keys a couple of times and found f12 worked the second time around. Try ctrl+alt+delete to reset to Toshiba screen quickly when one doesn't work and it begins to load os or go to blank screen. To load ubuntu I had to disable safe boot to change bios to old version, non uefi called csg or something. Boot worked fine for linux after that. Alternatively, if you still have windows 8 installed, go to start menu type bios in search bar, click on change advanced settings(think it was called, the first obvious option anyway) and you can do it through the interface provided.