4.You could buy a gun without showing an ID
I think it was GCA 68 that gave us the 4474 form, and I think you had to show ID.
And 5 may be wrong, I believe there was an automatic report of transactions over a threshold that varied from day to day.
Otherwise, yes.
You could carry a knife in a school, or on a plane.
You could buy a gun without getting the governments permission via a phone call to the FBI or your state in Florida.
Before 1968 you could order guns through the mail and there was absolutely nothing wrong with that but I doubt it will ever be true again.
“You could carry a knife in a school, or on a plane.”
In the mountains of western NC, during hunting season boys could take their hunting rifles to school on the school bus. They left them on the bus all day so they could hunt immediately after school.