You can mine with CPU and GPU. I used to do it when i mined XMR and Eth. Just do not expect to earn a lot from your CPU mining as it is not currently profitable when doing so. However, if you are fine with that, then knock yourself out and mine XMR with it.
Agreed. I would double this, don't expect too much with CPU mining. It is just for fun and long term holders.
Cheers,