You have to pay a certain amount of money to the bank depending on what room you want
Yes, they can.
There is no such code
You don't ask for new rooms you have to press pay morgage and pay off your morgage and each time you do that they expand your house
You can't. Resetti's house is only in Animal Crossing City Folk.
Ya! Your house in animal crossing wild world can hold 4 pepole!!
Nope.
No, but Animal Crossing: Wild World you can get a AR DSi and get infinte bells.
You cannot get light on your house on Animal Crossing wild World.
A mansion.
the left room
You can't.
Is does nothing but to decorate your house.