@jrdepriest cis male here, although i have an unusual relationship with gender that i'll call "gender-meh".
1, 2, 3, 4) i was *told*. at five i was an only child and had no notion of there being anything else than "boy". i did not, of course, think about girls. that i only played with other boys was not a decision on my part; it just happened.
(when the other boys giggled and asked me if i knew the difference between a boy and a girl, i said "long hair". amusing that i was more right than they were.)
5) i imagine i would have accepted it.
6) that would have been deeply upsetting — i'm autistic — but i can't imagine it happening.
7) no idea
8) i played with both. asked for dolls, sometimes.
9) pretty certain i would have ignored that.
10) ooof, that's just *wrong*.