Could also be a bad reference voltage or ground. With that many stored memory codes, I would at least test some things before hit and miss diagnosing. Often times with wiring that old, sometimes the problem is the not sensor itself. I've replaced a ton of sensors in the past and it sucks to spend the money to replace a good part.
TPS can be tested with an analog volt meter, it is a "variable resistor". Check the reference voltage (+5 volts), signal to ecm should be around (+.9v ~ 5v) and should sweep smoothly through that range from idle to WOT, and check the ground. Test is typically done with the key on engine off.
Screw on the throttle is not an idle adjustment, but the setting for the base TPS voltage. It is best to leave this screw alone as the computer is what controls the idle. If it is off, it will have you working in circles.
MAP can be tested with a DMM that can test frequencies, and a vacuum gauge for reference.
More info here:
+1 for fuel pressure test. This is usually a good starting point to make sure that at least that vital is where it needs to be. If the fuel pressure if low, you will spend a ton of money on sensors only to find out you've been looking in the wrong place.
Best to start resolving hard faults (KOEO) and move on to the stored memory codes.