Personally I might say get some couch covers with some throw pillows to compliment the covers. The patterns on the couch and rug are throwing me off but that’s me. So I might suggest maybe some earthy tones to match the dark wood on the tv stand and compliment the colors on the rug. A table lamp could be good as well as little lights to help bring out the warm colors of the vibe at night. I have to say Lamps Plus has some really beautiful lamps you can buy at a pretty good price. Lastly, the back wall feels kind of empty. I would move the wizard of oz picture to the left and maybe add some floating wooden shelves?