Well you have found it now... 
The gold key worked...  But where are you?  From the looks of things...  This is the master Bed room!!

~ All around you!  YOU feel them close!
Lost souls ... Oh, the children...
You can see toy dolls all around you.  The air is cold and you feel traped.  But you are not traped you can leave any time!  What ever can you do?  What is this all about?  How can you stop this?

Ghost like child like...  The voices fill the room...
"Help us... WE're traped...
Help us!"

~ something pushes you out of the room and slams the door in your face!  But some how you now hold something in your hand!...  Its the last key.  Black as death and with a skeleton head.  Does it go to the last door?

Back out to the hall?