Greys would look good in these rooms. I wouldn't paint the paneling. Rather than a mirror over the fireplace a large scale painting would look good.

Much as I love wood blinds, in your case I would go with the white. I'm afraid the wood blinds would chop up this expanse of windows where as the white would give you a blank slate. You could always add color in roman shades, etc. (Love the flowering trees!)

I was about to say grey until I read the last line. What about a light brown carpet?

Hey Guys I'm a newbie I've decided to slowly paint and change a few things in my Nan's house in hope's of transforming it and making it less of an eye sore Never done anything like this before , but love a great transformation. And thought this be an awesome project for myself. I am starting off with the bathroom, I will attach some photos of it currently, I was looking at warm greys for the walls , ceiling possibly white-ish but need more suggestions on colours , as I completely stuck as this anything would be helpful will probably paint first, then do flooring , then vanity?? And what's the best paint/brand to use? Thanks