Agree with others you need a floor plan, also pictures of the garden.
I'd highly suggest that of you can afford it you'd do well to magnolia everything and white gloss all the dark paintwork ...if you can find a local painter to do this they'd be in and out in a quarter of the time it'd take you and do a much better job so maybe ask round.
Then see if you can get a cheap carpet throughout in a lighter colour.....an oatmeal or similar....much more appeal in pictures.
Definitely lose the tin foil style wallpaper and the stickers off the kids bedroom.
If you can't afford any redecoration then floor plan, pics of garden, rough room dimensions, stickers off walls, maybe video walk through.