Here are a few pointers, do not buy it as it currently is:
- CPU and motherboard is okay.
- That video card is not suitable for gaming. For gaming you need something from the NVIDIA GeForce line. On a budget I wouldn't go below the GeForce 750.
- Don't bother with a separate CPU cooler, use the stock one. The money can be spent better elsewhere.
Most important: Do not even think about that power supply, those low end units are dangerous pieces of junk. It will never come close to producing 750w and will have most/all safety features removed to cut costs, not to mention the poor quality components. It's cheap for a reason.
For a PC like that up to a GeForce 750ti video card, this PSU would be sufficient:
450W XFX Pro Core Edition. If you were to go for a higher end video card you would probably want to go up to the 550w version of this.