[chryuop]

I don't expect to solve all your problems, not to take away the job of helping from someone who is for sure much more competent than me (and mind that I might completely wrong in what I say).

However for the couple of word you said you cannot find in any dictionary:
老幼婦女子 mean "old and young, women and children"
while 一変 means a complete change. I have had a couple of native speakers confirming this and a couple denying, so take it the way you want, but the 一 used alone has the same meaning of 一番...from here the biggest change (sorry to the rest of the forum, but I don't know this in English, it means also dietro-front).
Then to Nagoyankee the easy (for him LOL) job to fill the huge amount of blanks I have left.