Do you know what the paint color is in your main rooms? Knowing what you have will help others with their suggestions.

Paint color is the same all throughout

That floor dictates everything. No amount of warm paint in the world is going to warm up things up with that floor. Either embrace it and choose colors that work with it or cough up the cash to change the flooring and go from there.

I think this blank slate allows you to introduce warmer tones easily, with rugs and upholstery and other deccorative items. I would not paint anything.

Do you know what the paint color is?

Your starting point would help others to suggest warmer options. From the screenshot photo there is no way for anyone to guess what color is already on your walls. Help us help you!

Burn the plastic floor. Except it would just put out even more noxious fumes.

Yes, the real problem is the floor and the paint. They both lean clinical grey. Hard to believe people are putting this in new builds in 2025.

It seems unlikely that you are going to install a new floor throughout the house, correct? If you are leaving the floor as is, you need to be careful to not throw tons of really warm paint and upholstery in here that is going to clash with your floors.

I'd get very large area rugs in warm-ish tones. Then paint the walls and ceiling a neutral white that leans warm but isn't too, too warm.

Leave the cabinets alone. Add brass hardware to the bathroom, bathroom lighting, kitchen, and kitchen lighting. Brass faucets would help too.

Can you show us some images of homes you like the look of and we can see how to guide you towards making that happen in here?

I disagree with some of the comments. I believe you can bridge the warm & cool tones, a little tricky, but I’ve seen it done with interesting results, not so “one note” like a lot of decor so popular now ( seas of cream, whites, light wood, etc. ) that I see in every model home & furniture showroom. it would be helpful if you could provide a close up photo of the flooring.