To save you having to read the longer message: I don't think Lois' father was ever mentioned or referenced in any context in the Reeve-verse, but have very little memory of IV or III (especially III).
I will check my version of the Donner cut when I get home, but I don't recall her mentioning that her father taught her to shoot (also didn't see in the version of the script that had that scene). I'm fairly certain that it was only with Crisis in the '80s that Lois got a military father in the comics, but will try to find the information to confirm that. If so, it's less likely to have been that way in the Reeve movies. I know she had farmer parents in the comics at one time.
Honestly, from the Reeve-verse, I remember only three mentions of/references of her family. Lois is the girl in the train scene in the first movie (in extended footage/not theatrical version - I read an earlier
script where Lois was born about the same time as Clark, and he was a child, not teenager for that scene) and I think parents were there, but actor ages make the child as Lois improbable. In the first movie, Lois said her sister had "three kids, two cats, one mortgage" and, of course, Lucy in the Supergirl movie, if you count that as part of the same continuity.
Edited to Add: DC Wikia seems to indicate farmer-dad last actually appeared in 1983, but I acknowledge that's not proof of the movie version not being military.
