You can do the RAM/memory (8GB max) and a SSD or a 7,200 hard drive (SATA 3Gb/s) can't upgrade the graphics.
| Memory Slots | 2 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM |
2 4GB RAM modules from Crucial.com should do it.
The machine is almost 5 years old, if the keyboard/trackpad is worn out then it's usually not worth upgrading.
If you have been using a external keyboard and mouse, thus your built in one is still good, then sure you can upgrade the machine.
Install/upgrade RAM or storage drive in Mac's
How to clone your old hard drive to a new hard drive / ssd