Fisher-Price dollhouse people and accessories

Got the (old) "Loving Family" dollhouse used and although faded, otherwise in excellent condition for $15. I can't afford to spend $15.00 per room (about $100) to furnish it! Surely someone has used, yet in good condition dolls and furniture that will fit. Could be any make/model/brand that will fit the house, doesn't have to be "Loving Family". My Autistic son needs an interactive toy to role-play social roles and increase his vocabulary. Looking to spend a max $25 with shipping included.