Hi-yes paint would do wonders. Check Elmira White and Collingwood. Good Luck!
Hi Maria, I would recommend having a look at Porter's Wood Wash paint. This will soften the overall look, and maintain the look of timber. It will lighten and uplift the entire space.
Hi Maria, we love the wood but it is a little overwhelming in that space with the timber floor. A liming white is a great idea as mentioned by a few people here. This will let you have the best of both worlds, a lighter, brighter finish while still allowing the wood grain to show through. You could try Feast Watson Liming White Floor Finish (yes, it's not a floor but it has the size of a floor!) and build up the number of coats until you are happy with the amount of timber grain showing through. You'll probably need to give it a light sand first as it's most likely already got some type of coating on it.
The other option would be to leave the walls as is and consider a large, light neutral coloured rug as pompom suggested on the timber floor and perhaps a good sized piece of art on the wall or white wall shelving instead of the dark side unit you have to reduce the amount of timber in the room.
I personally would cover up most of the floor with a light colored rug and see how I felt about the room after doing that. If I still was unhappy I would put a large mirror opposite the window to bounce light around the room. Putting up a large mirror lightens the room and covers up a good deal of the wood. :) it looks like the mirror would go over the sideboard/console thing you have, you just need to take done those little photos. As other posters have mentioned a few large artworks would cover up a lot of the wood and brighten the room. If you must pain the walls you could leave the wall behind the tv as the wood, as a feature. really does seem a shame to paint it.
ps as another poster said, if you feel the room is dark get lighter colored furniture, it would make a HUGE differece
paint it-you wont regret it
Im agree with a lot of the PRO suggestions of liming or oiling the wood in a whitewash to maintain a natural beautiful wood grain but get the light look, best of both worlds, then paint ALL the window & door trims & skirtings in a soft white for a crisp contrast. Will look great as the walls won't be as white.
I've included a pic to help you visualise.
Whatever you decide, good luck and enjoy!