Have you owned this for a while and it just now has a bios password? Or did you buy it from Ebay and it has this password on it? A guy I work with bought a Dell Laptop from ebay, which seemed like an alright deal, wasn't super cheap. He got it and it had a password on it before it even booted up. He called Dell and they insisted that the laptop with that service tag was in a warehouse in texas or something and couldn't help him. So we looked on line and there were a bunch of places selling the "secret" to get past that password. Some were password generating programs that used the system tag number, others were instructions that involved paper clips to short some chip out.
Well, they were a couple bucks to buy, so he figured he had already spent a couple hundred on the laptop that he can't use, what is another $20 to try. Needless to say, none of the "secrets" worked and he found out he bought a $300 paperweight. So we went to a place here in town and bought a stripped out dell case of that model, that had a motherboard in it. And we just moved over the hard drive, lcd screen, memory and video card.
But we never found a way to get past that initial boot password. I hope this isn't the case for you.