Well, everything is not simple ... Of course you can add memory, you can replace the hard drive on the ssd, and he hard, through an adapter, to put in place the drive Dvd. The video card is likely "soldered" to mamma, and its replacement, well, you understand. Processor, everything is complicated ... It is necessary to see how and what did the manufacturer if there is a similar laptop, but with a more powerful stone? If so, try to learn the same from him motherboard, or not ...
And most importantly, it is necessary to solve the "what for?"
Modern games are more demanding on the video card than the processor.
Working with graphics, photos, videos, or any cady something else, demanding to the processor, well, maybe it's worth a try. And if you want to just "work quickly", Georgia laptop, open programs, and pages in a browser, then simply put Ssd.