CPU doesn't matter with regards to mining, you need to have a good GPU.
Is my graphics card very good? (NVIDIA GeForce 320M)
No see the hardware link I gave.
At your current rate: 1Mhash/s is a losing proposition you are going to pay a lot in electricity and not get anything out of it.
Does my Mhash/s depend on internet speed?
mhash can come from CPU or GPU, but you will get more from the right GPU. Again see the link.