You could search Google for the following:

clear cmos toshiba 135-S2246

or

clear cmos toshiba a135-S2246

which gave me this:

http://www.google.com/search?hl=en&q=clear+cmos+toshiba+135-S2246&btnG=Search

at which I found this:

www.s2services.com/bioscmospasswordfreeware.htm

and a whole slew of other hits dealing with this problem.