2. Your ram seems to be integrated too
What the forget?
Ok, basically, your computer cannot be upgraded.
1. Your CPU is really old and the chances are that the socket it uses is old.
2. The socket being old, the motherboard is properly old.
3. Motherboard being old, RAM and graphics are obviously old too.
Basically you need an entire new computer. It doesn't take much to run TF2 on lowest settings, but to run it on highest you will need a MUCH better computer.