I want to sell all my furniture, but I don't want to sell it from the Internet, is there someone from a warehouse or a furniture store that buy used furniture from a home?

Google your city name and used furniture sales or call your local public library's reference desk for names of merchants who do this. There are several used furniture stores near me (Chicago suburbs), so I know they exist.

But understand that most places that are going to buy furniture, will give you pennies on the dollar, for example a used couch you may sell for 40 to 80 dollars a "resale" place will give you perhaps 20 dollars for.