1: They should be pretty much the same. The right side looks to be on spec, the left is within the spec range. I would suggest rechecking the bearings, make sure they are properly preloaded. That can give a false reading.
2: The Caster spec is 1/2 degree for your year truck, with a 1/2 degree plus/minus tolerance. The right side being more than the left could indicate either an out of level or twisted axle issue. If it's driving ok, I wouldn't worry too much about it. If it does bother you, you might put either the next size up wedge in the left, or go down a size in the right. A little extra caster will not hurt anything.
3: Toe looks ok to me. Once you your conversion, it should come out to 1/8".
4: .04 degrees is acceptable. I've seen newer cars with more that drive straight.
5:I can't really help you there, but I'm sure there's a conversion table somewhere. Jerry (Hotrod Lincoln) would probably know for sure where you can find one.
I wouldn't put too much concern in the numbers given for the rear, there are no adjustments. They do not look too bad at all. If the they were way out, indicating a swung axle or something bent, then there would be a concern.
