With all those DM codes, I am surprised you don't have more on pin 8. The first thing to do is clear everything and then see what comes back. You don't know how long these codes have been set, some may predate previoius repairs.

Next step is to determine the condition of the wiring harness. The collection of DM codes point toward an original, unreplaced wiring harness. The driveability issues are also typical of failing wiring harness.

The pin 8/code 13 could be vacuum leaks. But it could also be triggered by corrupted sensor inputs due to a bad wiring harness.

Use the search function to find old discussions on the 124 wiring harness, how to determine condition, etc.