So I found a PC on friday afternoon and although it was all dusty it seems pretty good. I spent saturday cleaning it and every part I could of all the dust, just need to buy a monitor and power cable and stuff but im not sure if it runs just yet. Also there are alot of cables that arent connected tk anything, is that normal?
I feel kinda bummy about not having a shiny new gaming rig that lights up and is all stream lined but since its literally my first time working with this kinda thing so im not really quite sure what to do from here.

Oh this is a picture of the thingy, all cleaned up. Please let me know.