It may be in the wrong forum, but I am selling my old win 98 PC and need a price. All I know is that it's processor is an Intel Duron 700Mghz. I know to get other stuff by pressing Del at start up but it needs a lock key that is un-known.
I've got an old 466mhz PC sitting in my attic, not really worth anything. Yours is a bit better but I'm afraid to say I too think you'd be lucky to get £40 for it. Download Everest as has been suggested or Belarc click here they will both tell you the speed make and model of the processor as well as memory etc. As regards getting into the BIOS the advice given by pj123 would allow you to reset the BIOS but theres no need to do so really as either of the 2 programs will give you the info you require.