RE: What are the "fixed set of emotions". actions and poses for default avatars ?

The fix set of emotions is "afraid", "anger", "crying", "dislike", "ecstatic", "happy", "hate", "like", "love", "panic", "rage", "sad", "surprise".

There is no fixed set of actions and poses, these are whatever you wish to define in an avatar. For a specific avatar click on the avatar's Embed button from its webpage and the drop down for actions and poses will give you the ones available for that avatar.