These are minifigure sized pieces of furniture that you could use in a lego house.
Step 1: These Are All the Pieces You Will Need.
I tried to sort them per piece of furniture.
Step 2: Computer, Monitor, Keyboard and Mouse.
The keyboard came with a set. Just follow the pictures, because it should be simple enough to understand.
Step 3: Desk
this also shows how to put the computer, monitor, keyboard, and mouse on.
Step 4: Lamp
The last step adds a yellow stud to look like light.
Step 5: Nightstand/drawer
You don't need to put the lamp on, and you don't need to put the gold stud on the drawer.
Step 6: Chair (it Really Spins!)
I don't really have much to say here...
Step 8: Window and Planter
the first two steps are the same from different angles. The third step is putting a tile on top.
Step 9: Bed
I ran out of things to say.
Step 10: That's All, Folks!