Too cute. Hey, she's preggo. I love them.

Plain ceiling white is a good choice for ceilings. I'm a huge Natural White fan but will consider Whisper White next time I'm painting.

What a cool house design! Off the top of my head, I think I'd be inclined to paint the brick surrounding the sliding door (1st image) and either paint the pillars or clad them in same timber as the ceiling just inside that same sliding door (1st image). I'd be tempted to leave the large wall as bigreader suggested simply because it's such a magnificent feature. If you live with it for a while then still not loving it, then paint it. While I like the chandelier, it doesn't really suit where it is, as Warren pointed out. If you wanted to change, best to consider if there are any other electrical changes you want to make and get an electrician out only the once. As far as paint colour goes, do you know what the current wall paint colour is?I'd paint to match the wall colour and complement the carpet, but important to know if you like the current colour or want to change. Also it would help to know what your own plans for the interior style is. Do you want to remain true to the 80s with just a few tweaks, or change it completely? About the balustrade, do you want to change the colour of it as well? Is it also made out of glass (couldn't quite tell from photo)?

Dulux whisper white. Get a sample pot, paint a large piece of cardboard and see for yourself.