First off, I seriously doubt you need a sound board. As far as other sounds, check and see that the RS/SS switch is really in the RS position. If it's in SS, you get horn & bell only, does that sound familiar.
For the smoke, there is a voltage regulator, it's the very first item in the parts list.
I have no idea where the odd reset came from, the manual indicates it's a standard diesel TMCC reset.
STEP 1: Move the switch on your locomotive from RUN to PGM.
STEP 2: Plug in your Command Base.
STEP 3: Place the locomotive on track, then turn on power to your track.
STEP 4: Press ENG then input the locomotive’s ID#. Press SET.
STEP 5: Press ENG, the ID#, AUX1, then press 8 for this particular locomotive.
STEP 6: Turn off power to your track and wait ten seconds.
STEP 7: Remove the locomotive from your track, and move the switch from PGM to RUN.
STEP 8: Place the locomotive back on track, then turn power on to the track.
STEP 9: Press ENG and the ID#, then operate as normal.