You maybe lucky with the keys, Rockola used a G-200 key when it sold
wallboxes in quanities. I have that key and can lend it to you to try
it. Otherwise take to a locksmith and have him open them and cut new
keys.
Wrong records could be anything from the records in the wrong slot, to
a fault on the logic board, to a fault on the opto board to a crack in
the opto adjustment disc. None of these are major problems. Could also
be caused by the wallbox or the pulse convertor, rare. Does it always
play the same wrong record? ie 154 for 125?
Charlie Maier