Whoa...slow down! You haven't even completed purchase of the home yet. That is a very attractive kitchen, and you might find it "grows" on you. Live there a while, get acclimated to the new environment then decide what to change.

The paint color is actually the oddball in the whole configuration.

I agree with @suedonim75 that it is the paint color that is a bit off. I also agree with @porkchop_z5b_MI that you need to live with the kitchen before deciding what changes you might want. When I saw the subject title "Nothing matches!", I thought we were going to see a disastrous hodgepodge of colors instead of the quite nice kitchen that you have. The thing is, everything actually matches except the wall paint, and even the wall paint isn't bad.

If there was one thing I'd change, it's the backsplash.

I am sorry, but it's never going to be a "sleek, modern look" that is your fantasy kitchen. If you want that, it's a complete do-over. And by the way, ripping out that floor and replacing it will cost a lot, and not be budget friendly that you want, and sometimes when you rip out a floor, it starts a chain of required changes that add up and add up.

Yes, it was a model home years ago with probably a warmer wall color. Someone decided to "update it" with a gray wall color because they thought that it would make the house appeal to more buyers. Too bad.

I am sorry, but it's never going to be a "sleek, modern look" that is your fantasy kitchen. If you want that, it's a complete do-over. And by the way, ripping out that floor and replacing it will cost a lot, and not be budget friendly that you want, and sometimes when you rip out a floor, it starts a chain of required changes that add up and add up.

^^^^This.

It's a very nice kitchen as is (minus the paint, which should be an easy fix). It's just not the kitchen you dreamed of. Try to learn to love it, because the makeover you dream of is $$$$. It looks nicely laid out, which I think you will appreciate once you start working in it.

Beautiful kitchen. The floors appear to be travertine which, you are correct, are expensive and an upgrade. I would absolutely not paint anything in that kitchen except the walls.

You will want to put hardware on the cabinets to cut down on grimy fingers all over them.

I agree with all the comments. Paint the walls a neutral if not a warm white. You can still decorate your family room with grays and white if you like those colors, with a dark gray sofa and a rug that incorporates the beige from the travertine with the gray and black you like. I would update the pendant lights.