Pretty up the outside front with flowers in pots. Do something with the patch of weeds where burglars can jump past the bins to get into the house. Don't include it in the photos, because it looks a nightmare in terms of security, but if they get in the house and like it, they might look past it - particularly if you could add some trellis to make it look safer.
Turn the room with the staircase into a dining room with the table from the conservatory and a crisp, spotlessly clean tablecloth.
Switch from those blinds to nets. Just plain ones, just because blinds look bad from the outside even more than they do from the inside.
Shove a rug over those paving slabs. Get rid of the 70s furniture in the conservatory - you could put the sofa, TV and other furniture from the 'Dining Room' in there, along with the coffee table that's blocking the woodburner and that would make it look a lot less of a badly built lean to. Put the wicker chair into the bathroom with a new, fluffy (white) towel draped over it.
For the child's room, I'd put the bed against the wall the window is on and rearrange the furniture so it doesn't look so shoved up against the edges - I'd put the patterned drawers at the foot of the bed if it fits, the chair next to the head and the wooden CoD where the hamper is. And a pretty picture on that huge expanse of white wall beside the window. Stick a larger Teddy Bear on the wooden CoD and the small one can go on the bed. The rug looks tatty, so lose it. If you had the money, gritting your teeth and repainting it a pale grey would mean a lot of your target market would like it a lot better than the bright yellow (and pink would still go with it).
I actually quite like the kitchen, compared to some I've seen, and think the only dressing you could do was a stand mixer or suchlike on the empty run and perhaps a coffeemaker (gives the idea there are more sockets) and some brand new teatowels.
Sand and repaint the wood clad wall. It makes it look like a knackered shed.
And leafy plants. Large ones. Lots of the things.
Then take new photos. Nuneaton in the pissing rain isn't exactly desirable.