I think just removing the wallpaper and and painting (instead of adding more wallpaper) would make a big difference (particularly in the bathroom). Also, I would get rid of the current mirror in the bathroom and replace with a smaller framed type, paint the cabinet and new hardware. Honestly, I think just paint will make a world of difference in your space.

Thanks charleee, sorry no better photos as house is in another city, I haven't even set foot inside it yet. I am trusting my husband on this one! Our youngest is 5. Thanks Sheilaskb for the strip suggestion and the advice on the carpet. The kids are really good when we go out, holding onto rails etc but it is another story once we are home. I guess I will need to be a little more vigilant once we move in.

Hmm, I'd aim for balance. The last time these colours were in fashion, in the very early 1990s, I had light pink, light blue , light green and black. In some rooms there was white instead of black. They all worked well together. There are lots of recent pastel rooms on Houzz photos. Also florals are about to appear on the scene, in big digital murals and digital printing on cushions, on rugs, etc. it's a modern version, but still florals. Pink and the pastels work well with florals. Which way does the room face? If it faces South, in the Southern Hemisphere, go for a warmer colour.

I'd go red shaggy rugs ( assuming the photo tones are accurate , I don't think it would accentuate the pink , it would blend it and even make it look slightly more neutral ) . And I'd do a few larger brighter maybe abstract pictures , even if you start with 1 $200 one and add one every 6 months . That assumes the rental lets you , but the advantages , as well as the obvious that you can add colour , choose styles you like , even move from room to room for a change , but also you can take them with you . Colours are up to you , but if theres a slight pink , maybe go red and orange and even green tones , with bits of anything like yellow or burgundy or black -- even something with several shades of blue should work too . Half the fun is trying things -- oh , and if a particular picture doesn't work , you can sell it and choose another -- it's not a huge cost for the effect if you get it right or even nice haha .