All I need is for the grapics to work, 4GB ram and thinking of a SSD and I don't have much money so that is my only choice[Mod note: Merged two threads]
Commented on your other post but you mentioned the exact model here. You have the Intel GMA 950 GPU. It's a terrible graphics card, even for the time. Problems are relating to the hardware bottleneck, along with the rest of it.
This is the reason why your Mac Mini is unsupported for 10.10. It's because the hardware just can't deal with the OS.