Lets try and work with what you have for the most part and go from there.

I see 2 mismatched end tables, 2 other tables, 3 mismatched lamps, teal curtains and pillows and a shelf. I'm guessing the bedding is new as that is where the paint swatches are? I would take the lighter silver/purple pillow to the paint store and try to match that color for the wall in an eggshell finish. Then :

1. Pull down the drapes and try using RIT color remover then dying them grey with a Dylon dye. It may or may not work...Worst case you are out ~$8.00. Otherwise grey panels. (~50.00)

2. Head to the fabric store and grab a textured fabric to match the curtain color and wrap the sitting pillows on the bench in it maybe even change the pattern on the light pillow with the same fabric. (~$ 10.00) then center the bench under the window.

3. Mount the TV to the wall with a wall kit and get a cord hider. (About $ 20.00 for the mount and $ 5.00 for the cord hider that you can paint.) Put the shelf about a foot under the TV and paint that the same color as the walls. You need that shelf for the set top box and dropping it down will allow you to put something else on that shelf such as the IPod Charger. Put one of the tables under the shelf..lose the other one.

4. Paint the gold lamp silver and get a white shade for it. (~$ 20.00)

5. Add a large print over the dresser in a silver frame - you can get a frame at a thrift store and paint it silver then use (a different) fabric as the picture. (~$ 15.00 and up) Same thing over the bed. http://lifelovelarson.blogspot.ca/2011/05/diy-framed-fabric.html

6. Work toward 2 runner rugs which would finish the look in grey or lavender. ($150.00)

7. Work toward getting matching end tables and lamps.

8. Work toward getting a new or used armoire for the TV area.