You can get a key with the correct resistor at your local hardware. It's
about $25 at the one near me (seems a little high).

As for the radio, do the following:

Press and hold presets 2 & 3 for about 10 seconds until the first 3
digits of the code are displayed.
Press the AM/FM button for the next 3 digits.
Email me those 6 numbers in that order.