Have you tried contacting your nearest Toshiba service center?
Over the years here, we have had a number of different solutions discussed for resetting the password on laptops. One that I recall for some Toshiba models involved a special dongle that attached to a port. For some models of HP laptops, the "fix" for a BIOS password is to replace the BIOS ROM chip and then load the BIOS.
My point here is, the most reliable way to get the password on a laptop reset is to work with a factory authorized service center and pay the fee.
An alternative would be to search the hack and crack sites for methods to reset the password on your Toshiba. CAUTION: Many of the hack and crack sites are heavily infected with mal-ware and viri. Proceed with extreme caution if you go this route.
As to ebay, stolen items have been a problem from day 1. ebay relies on buyers to help police the sellers and keep things honest.
I did not look up the auction. But, was it known that there was a password set on the laptop when you placed your bid? If so, I myself would not have bid on this. Even if I trusted the seller.
The laptop manufactures continue to make it harder to reset the system password in order to make a stolen laptop nearly worthless. If it was easy for you to reset the password, it would be just as easy for a thief or fence to reset it. The result would be an increase in the street value of stolen laptops.
As a side note, it is fairly easy to look up closed auctions on ebay and reference them. Just as you do not know if the laptop was stolen or not, we still have no way to verify that your need is legitimate.
Chas