How hard is it to replace these items on a 94 Accord? I've never done it before, not sure what all is involved.

I think it's time to change mine. Car is 9yrs old, I bought it 2 yrs ago, who knows when it was done last.

Think a new cap/rotor could help my rough idling problem?

What tools are needed to do this?

 

Its not that hard.
Go to automotive store and
buy Hanynes manual for your car...
It should explain how to do..

 

Haynes always makes things seem harder than they really are, I don't like referring to it for first time projects. How much should I expect to pay for a cap and rotor?