I went to auto zone because i got the check engine like so far they gave me 5 codes. 2 of them were for a faulty MAF so im going to buy a new one because i have already tried cleaning and it worked for a few weeks but now i need a new one lol. Ok so 1 was for a faulty IAT sensor. Im guessing the IAT sensor is located in the MAF. This is what i have read from other forums. As for the other 2 it is for a TP sensor. Im guessing this is the Throttle Position Sensor right? but where is it located and how can i fix it or where can i buy a new one.

These are all the codes:
P0102
P0103
P0113
P0123
P0223

My car has originally about 84000 miles but since i bought it from a guy who claims had an engine swap that has around 35000 miles.
It is a 4 speed automatic.
Also for some reason everytime i turn on the A/C my car idles really rough in P (Parked) and sometimes stall when in drive.

 

That laundry list looks like an electrical fault. I don't think 3 sensor circuits are hitting high and low limits by themselves there is some other cause. Have your alternator and battery checked, and check any potential between the ECU ground and the negative terminal of the battery. In fact check every ground just to be on the safe side. Hopefully it's something simple and cheap.