All of the following answers are my opinions:

Answer #1: I believe she did, but she had no power over her own body and Ultemica wouldn't allow her to warn Squall and the others.

Answer #2(it's actually a question): When did he die? I remember him like being lost and the others found their way back, but he walked and walked searching, but then passed out from exhaustion, not death.

Answer #3: Like I said, I think he had just passed out from exhaustion.