Just the heads up, that cpu is ancient. It’s performance is comparable to an Rpi 4, but that old cpu consumes 30W+ while a full rpi maxes around 6-7 W. Rpi 5 is around 4-5 times more powerful with less than half power.

So it’s good if you just tinkering with old hardware for fun, but you can buy far more powerful modern hardware for only several dollars if you look at the second hand market.

Also I remember, I dealt with Toshibas from that era, they were quite locked down, e.g. you couldn’t install upstream nvidia drivers on them only the outdated ones signed by Toshiba. So it’s not unexpected that they locked down also some options like that are missing in bios settings.