Your video card will be the weakest link for the game, the rest of the components are ok. You can run SC2 in low graphics setting but in order to really experience the game, you should upgrade your video card.
If you meet the minimum specs you will be disappointed in the game because you will have to lower your resolution, lower your graphic settings and avoid large battles. I would not recommend playing the ladders because your game will freeze on large battles and BNet will drop you.
Compare your system to the more optimized system requirements to enjoy the game fully. It is a great game but to really enjoy it you can't play it on min sys specs.
My processer is 1.99GHz with dual core but it says performance rated at 3.3GHz --Meaning it will perform at 3.3GHz while playing a game?
No, absolutely not. This is a misleading statement and the people that host that website should know better.
I don't think they measure this by saying 2x2ghz=4ghz.They have benchmarked these and considering the fact that this is a laptop,the cpu should perform like a p4 single core at 3.33ghz.I believe p4 is used for most games as the minimum requirement.It is kind of misleading though.