The house you are considering is great! Nice room sizes and so many windows.I don't think the carpet color or the wood should deter you from buying the house. I think what makes things look off to you is caused by the lack of color on the walls. Boring wall color and the empty rooms definitely make the carpet a focal point. Once you add wall color,furniture and accessories you won't see just the carpeting. Really with that color carpet you can use almost any wall color.The house needs color. Will you be using existing furniture or buying new. Think about your furniture and determine a wall color based on that. If you are getting any new furniture maybe an interesting colorful print would be the pop that the room needs and give you the casual feel you like. I have similar color carpeting throughout my house and golden wood trim too. I love color and have a lot of different colors in my house. I know that most decorators would probably frown on this but color makes me happy. In my house one bedroom is a shade of purple. Another is an orangey red color. I have one that is a mid tone blue. I just recently changed my master bedroom from the beige tones that the previous owner had used to a rich blue-green color My great room is a gold/tan color. I think all the colors work with my neutral color carpet and the golden wood trim. Here is a shot of my great room that shows the carpet and some of the wood trim. Good luck on your house buying and eventual decorating.

are the doors naturally stained? I can't tell if it's a decent job from the photo. Honestly, it doesn't look like anything special. Up to you. personally, I dislike wood trim unless it's large oak in a craftsman. I'd paint everything. having black windows w/the wood trim,,,,no. I'd replace it with something updated, but that's me. black windows and black trim is an option. these are thicker than yours, which look better black windows/doors and white trim. Either one of these options look amazing. don't even think of keeping your old wood trim w/the new items. you could always do the doors black and white trim \ I'd also remove the paneling and do drywall.

What do you mean by trim? Windoows? Door frames? Baseboards? Or are you referring to stair banisters, etc?

Have a look at the Blog posts and Colorography Lab at The Land of Color .com for attributes of lots of popular paint colours. It allows you to compare similar colours in detail. If you are looking at whites/off-whites or indeed any colours, note that the higher the Chroma the more colourful colour. A colour maybe so low in Chroma you might struggle to immediately recognise in which Hue Family it belongs. Even so, every single paint colour does belong to a Hue Family: identifying which, helps you combine colours with greater confidence. Here are some popular whites by comparison.