Just disconnect the CMOS batteries; you can find tutorials online. Or you can take it to a computer shop, it should be a simple fix.
I suggest you look at the many guides and videos, just search "removing BIOS password".
I had a Pentium III based HP laptop that stored the password on a chip that didn't require a battery to evade such a trick. The only fix was using the backdoor password that could be generated by using the serial number of the laptop (HP required proof of ownership, but I had dumpster dived this from their offices). The backdoor password was retrieved by wiring 50 USD to a fellow in the czech republic who had the keygen tool HP support would use.