Intermittent idle/rough start issue?

I’ve been having some problems with my car. Sometimes it’s hard to start, other times it’s not when it does start. When it is hard to start it’s rough idle and when waiting the idle finally goes back over the half mark when she rough idles it sits under the half mark. When it’s rough and when driving for some periods of time I get two same codes MAP/MAF Throttle Position Correlation and sometimes I get the code Post Catalyst Fuel Trim System Too Lean Bank 1 and also Idle Air Control System.
Those are the three codes that keep coming up whenever I ran on a computer. I’m lost with what to replace and I cannot find a single diagram online.