Any Toyota mechanics in the house?

My daughter has a 1993 Toyota Camry. During the last blizzard she got home and left the headlights on which killed the battery stone dead. I recharged the battery but the car would not start, cranked fine, but no fire. I checked for spark at the plugs and nothing. Pulled the distributor cap and noticed a lot of carbon on the rotor button, so I figured it needed a full tune up. I put new wires, plugs and a whole new distributor because it was only a few dollars more than the sum of its parts. Now comes the problem, I can't set the timing to the manual specification of 10 BTDC, I can get it to 0 or TDC and the limit of turning the distributor is reached. It runs pretty good at that setting but I wonder if it will run better if set correctly. The old distributor was bottomed out too but I didn't and couldn't check the before timing.

BTW - testing the old coil after the fact I found the coil was bad. Is there some logical explanation in killing the battery causing that to happen or was it just a coincidence?