ruthmand Rugs, rugs and more rugs...in all sizes and shapes! You can get some very inexpensively and they will brighten up just about any room. Have fun with it - you have a nice home.
Darzy Yes, a chevron pattern would be fun and lighten it up. You can get runners, etc. Many are washable too! BTW..white shades and light would make a difference too.
smergal1 Good ideas thanks for your feedback. Actually, I would like either a timber or light tiled floor, this will make a huge difference and make the house much lighter.
http://www.arearugsusa.net/product/oasis-wavy-area-rug
or
http://www.arearugsusa.net/product/moonwalk-facade-multi-area-rug-couristan