for other altcoin you need a dedicated gpu rig
I'm not even sure a core 2 duo 2.4 Ghz would be usefull for cryptonight... Most of those coins already have a rather high network hashrate, the OP might get desilusioned when he sees the little income it would make?
Specially when its a low end AND mobile CPU. Mobile CPU typically have in the vicinity of 1/3rd the TDP of the desktop version. The desktop version of that CPU is nearly useless therefore yes, it would be very little and it would heat up/strain the Laptop for nearly nothing.