Alright T.R my Honda is alive and running, but there is this problem

. When idling the Rpms go up and down. What could be causing that. I know on my old car it had something to do with the idle control valve but i am not sure about the honda. Any tips would b great. Also my Dash is not working except for the turning signals. No rpm,temp,mph, or fuel. I could really care less about mph but i would like to get my fuel and rpm working at least. I do have another dash here so i will check if it was a faulty dash but if not what could be causing that issues?
Thanks T.R
- Alex