The Question and Answer section for Romeo and Juliet is a great resource to ask questions, find answers, and discuss the novel.
Act 2 is more focused than Act 1, in that it mostly serves to establish the marriage which will become the root of the play's dramatic conflict. I think the characters like Mercutio are given more detail. I'm not sure we discover anything new...
The Chorus reveals that the young lovers will commit suicide in the prologue.
Calling Juliet it? I'm sorry, I do not understand your question as written. Please rephrase.