The column swap is not all that hard. If you have the VATS, you need to either change the tumbler, get a correct resistor key made to match the current key, or swap the resistor in the key. If you do not have the key for the donor column, you must swap the tumbler. A word of caution, it is easy to break the chime switch when removing it, as you must when swapping the tumbler. The column swap is pretty straight forward. You can use any 94-96 column in a 94-96, and you can use any column in a 91, but the 91s do not have press brake to shift function. The column will still work, although you will not have a connector to hook up the press brake to shift. You can also use any column in a 92-93, but if you put a 91 column in, you will not have the press brake to shift. There are a few donor cars out there with a non tilt column, but they are rare. If you are going to swap key tumblers, you will need the lock ring removal tool, and a pick/needle nose pliers, and an exterior snap ring pliers.
I personally, would not try to fix the column you have, it is not guaranteed that your efforts will be successful, and the time to repair is probably higher than swapping the column, because you really need to remove it to work on it properly. While you have the column out, it is easy to install a Fleetwood flash to pass headlight switch, and wire it to work correctly. You must swap the high and low beam pins, and you need an extra pin in the connector, with a hot at all times wire to the pin on the high beam side.