turn off animations and 3D objects
graphics:low
turn off background applications
Overall an outdated system so not much to do, you will experience lag. For maximum potential FPS close apps that you don't use (especially web browsers, those eat a lot of ram). Re-Installing windows would also most certainly speed up your PC for a while but it would wipe everything you have on it.
So I have a really bad PC (I had it for 12 years but I'm going to buy a gaming PC in june).
I want to improve my fps on Toribash because it is really laggy sometimes and It's anoying.
My PC info:
Processor: Intel Petium Dual CPU T2310 (1.5 GHZ)
RAM: 2 GB
Operational System: 32 Bits
Windows 7 Ultimate
It is a simple laptop.