How funny. I just renovated (on a budget) my small kitchen and added exactly the slate look in tiles you have, though they are in fact porcelain. And I placed them throughout the house for continuity. The tiler asked if I was after a retro hippy look but it doesn't look like that at all. My cupboards were the same colour as yours and I utilised the bones of the kitchen and had the doors and Benchtops changed only. I also have plenty of light in the kitchen but chose white doors and as I was on a budget I chose granite look Benchtops, they are very serviceable and it looks great. The blue backsplash was the colour lift and here you could choose any colour to your liking. Basically the kitchen ended up with white cupboards and appliances other than cooktop, with the stainless cooktop and coloured splash back being the focal point. The paint colour are: whisper white walls, integra splashback, white ceiling and for increased contrast I used the same white above the splashback on the rear wall. I would consider painting out the brick but leaving the texture.

Looking at the attached photo you can see compared to close to the wall the floor tiles are streaked with white stains. I have tried using vinegar and scrubbing brush and also other cleaning products....

Get a tile cleaning product from Bunnings. Will ensure that the integrity of the tile is not compromised. However, by the look of the stains it seems as though something has been used that was too abrasive, too acidic or that had bleach in it. I do not recommend to keep any product on for an extended period of time. 5 mins max application!

There’s no nail holes so it’s a floating floor of some type. Impossible to tell if it’s engineered wood or bamboo or vinyl. Take the picture to your local flooring shop and they’ll be able to show you something similar.