Lordy, when it rains it pours.
RE: the display; have you seen this post? in the latter half. A known problem is with the bulb that backlights the display. The socket contact goes bad and needs attention. If you are lucky, it might be the just the bulb. Checked your fuses, right?
On your other problem, do you actually see the LOK indicator with the display not working?
You will have to get that going before you can input anything. Hey, I found another online place that will get your code back to you for $15
, paid via PayPal. Same disclaimer. But you have to do a procedure that displays #* on the display and provide to them.
1993 Red SSE - Bone-Stock except for High Perf. Power Antenna-Original Owner. Less than 130K - Love of my Wife
'05 Magnum R/T Hemi - Bunches of classic VW Beetles... and one "not quite stock."