Who
Who is the old guy in the flasbacks ?
The Vicomte
Was found dead with a rope around his neck.
Creepy backstage guy
Why does La Carlotta croak when singing?
Her throat numbing spray was switched for alcohol
What does the Phantom destroy that starts a big fire?
The Chandelier
Whose grave do we visit in the end? What does the Vicomte find there?
Christine's grave, a rose with the engagement ring on it.