The Misc Furniture is a mod for CF by platonymous, hence you must install it first to make this mod work.  It casts up more than 15 miscellaneous furniture items to your game to provide you with a better gameplay experience. It is mostly ripped from the game and has an addition of 17 new furniture items. Its purpose is to add up more furniture instead of modifying the existing ones. Therefore, you will need to buy them either from the catalog or from Robin. You should not be putting the Custom Furniture mod folder as it has to be directly stored within the Stardew Valley mods.