Okay, hope this can be helpful to you.
Move the TV out of the corner. Slide the computer desk over to left. Move the student desk next to the computer desk. Butt the student desk all the way over to the right wall. Butt the computer desk to the student desk. Now, if you have enough space, push the TV back into the corner. If no space, consider placing your TV on one of those ceiling/wall mounted TV holder things.
As for the wooden dresser, paint it! (I don't see an antique desk, did you mean the dresser?) Unless it is in PERFECT condition and of a historically significant era, you will not devalue it by painting. I would paint it white so that you can use it in any decor, should you change your color scheme. Too scared to paint? Change the hardware to colors in your decor.
You have lots of posters and such on the walls and could better utilize the wall space with wall storage. Check out IKEA's website for cool shelf and wall storage ideas.