I can't find animation in the forum list ....

http://www.renderosity.com/messages.ez?ForumID=12351

1) I don't believe so. I think it's just one pose per figure. You'd need to save separately for each figure. Maybe it'd work if one figure were parented to another, as it does for props ....

2) First, increase the total number of frames. Then, in the animation palette, draw a selection box around all the existing keyframes and drag them to the end of the timeline.

3) That depends upon what you mean by a polished ending. Are you talking about transitions like fade-to-black, or creating a looping video?