I couldn't answer the BIOS question at the moment, I left the laptop at work running a full PC Doctor list of tests on autopilot.
But the model is a Toshiba Satellite P25-S520, Released sometime in 2003 I know the BIOS is made by phoenix, and the earliest Flash for the bios listed on the Toshiba computer specific download page is for "ACPI Flash BIOS version 1.10" I don't know if that helps. I've tried looking it up but even Toshiba doesn't seem to keep records of what it came with just a small blurb of text "Bios
• ACPI, PnP, VESA, DPMS, DDC, SM BIOS, PCI BIOS support" I know by doing research this particular one pre-dates and doesn't support USB booting, I was quite saddened by that. I managed to do some digging around on the "InnTARRnetz" and found this Thread
it looks like a guy with the same model tried to put a 320gb HDD in and had issues. He listed his BIOS as "Phoenix Bios v1.8" so I'll assume its close to that if not that exactly.