I have a Toshiba Satellite laptop with a 1.80 GHz Intel Celeron processor; it runs at ~5%-10% during idle time. How much money can I make if I find a reliable mining program?
Nothing. Forget about mining. You can only profit from mining bitcoin if you use expensive ASIC devices, such as the KnC Jupiter. GPU mining is dead (and CPU even deader). Most people who are interested in bitcoin agree that it's a better investment to just buy some BTC and wait for the price to go up.