Use whatever USB mouse and keyboard you wish. If you have some non-USB interface peripheral, likely an adapter will work.
You can also use whatever monitor you want. If you have all these, you can get a new Mac for about $600.
LOL, I am still using my 10 or more year old Gateway VX900 19” monitor with my G4 Powermac. I wish it would die so I can go out and get one of thos Apple cinema-series or what ever those Mac monitors are called.
If the little ball spins too long for me I just right click on the application in the dock and click force quit. It is that easy. I don’t need to do that very often at all, though. It just closes that application.