I'm going to suggest a few changes that will neutralize and freshen the space. When you have your house decorating plan, you can add more style with art, furniture, etc.
The easiest thing to update would be the walls and ceilings. I would take off all the small decorative trim. Paint the walls a fresh, light color like SW accessible beige, paint the ceilings white. Paint the entertainment center the same color as the trim. Take the heavy valances off the windows, leave the panels for now.
Q