I would vote for the top example here. Itr gives an earthy tone to the room and yet is still bright and wont show every piece of dust or food.

Very light grey on all walls would be nice or white. Lighter colours like white tend to make spaces bigger and in ur case this needs to be done. The artwork on the weight bearing wall (in kitchen) needs to go as this draws ur eye to the wall . The railings on the stairs need to be painted (either colour of the walls or white)as this will help blend into the background and make the space look bigger.

It is difficult to tell exactly what colours are there already, but I think you need to consider what kind of visual impact you want the fence to have compared to the rest of the exterior. If you choose a colour similar to the house, the effect will be a unified frontage and the look of a larger property overall, but giving the house itself less impact. If you would prefer to create a visual break so that the house retains it's dominance on the block, a darker, cooler colour would be best for the Colourbond fence. I personally would recommend blending the fence with the gate as opposed to creating a contrast (which can look busy), but it comes down to personal choice in the end. Try holding a colourbond chip up to the house from the other side of the road and you will get a vague idea of what I am talking about! Good luck with it all!

Post a picture for more comments. Otherwise be bold and choose your favourite colour.