1: I feel like generally it’s lacking furniture
A fireplace , small tables holding goofy artifacts like maybe an antique desk of sorts with a candle skull , shit like that
2: probably some more decorational “realistic” stuff
Mail boxes , maybe like electricity boxes , stuff like the latter makes it seem like a neighborhood may be older , less OSHA infested vibe , etc
Yard furniture and stuff could work depending on the vibe
3-4: probably just personalize the setting more
Add a pattern to the bed sheets , maybe some figures or books , textbooks , depending on who’s room that is
Living room could use sprucing with personalization as well , maybe some sports stuff , a tiny shoe rack , posters , whatever comes to mind man