Are the servants armed with anything?
Hammers.
Are they just wandering around like zombies right now, or are they doing something / were they gathering when we ran in?
Right now they're gathering to kill you.
Does escape work?
Yes.
Is the entire estate considered one big arena for one-use abilities?
Yes.
Are there passages further to the left/right/up?
Only to the left and right.
Do we know which direction the master's room is?
Upstairs (to the left).
Maybe she has a balcony we could fly into, for example?
No. And mounts don't work inside the house, by the way.
Are there any other entrances/exits we know of?
No.