I have a country theme in my house, and yes, I have a few roosters but I really tried to not overdo it.

I used a palette of red, brown, and blue in my house. I did two walls in my kitchen red and the rest brown. It really brightens it up, but not to the point I'll get sick of it.

I think the key to not overdoing modern country is to avoid all of the cliches and focusing on colors and pattens. Gingham is a great material for throw pillows, and looks great in red. You can use gingham for curtains as well. I have a straight black table, but I have benches instead of chairs, so it gives off a country feel.

Add a braided area rug on your floor like this brown braided area rug. It gives off a country feel and is very comfy under your feet. 

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Cold Floors and large cold rooms?

Without dropping a fortune on changing your floors or getting new windows, I'd say that if you do a little decorating you might be able to warm up the room.

Place large area rugs on your floor in key areas. Purchase three or four large rugs and place one in the living area, one in the kitchen under the table, and the other two in additional open areas. Having a rug down on the floor really cuts down on the wide, open feeling by cozying it up a bit. Try a rug such as this Caviar Wool shag area rug It has a deep pile that is comfortable to sink your feet into.

Do you have a fireplace? If not, you can buy portable fireplaces that you can place on key walls. If you are able, buy two: One for the kitchen and one for the living area. If you get the right kind, they do generate heat.

Do you have pictures or art on your walls? Having bare walls just contributes to that wide, open cold feeling. Put up large photo frames, art work, or mirrors. Add some throw pillows and couch blankets to your sitting area.

Color makes a room feel cold as well. Are your walls white? Painting a warm brown, taupe, or coffee color can really make you feel as though your room is cozy.

Have you added weather stripping to your doors and windows? Magnetic weather stripping can eliminate cold drafts.

Whatever you plan on doing, even implementing a few of these tips can warm up your room.

Would you help me decide on a paint color?

I would like either bright yellow or dull blue.

What colors should we incorporate into our apartment, to make it look classy, but welcoming?

When you put in new wooden floors , are you suppose to place throw rugs or will that just take away the idea?

I would get area rugs, and here is why: Area rugs will protect your floor.  They will also add a real sense of style to your room, so you can change up your decor by getting a different rug for each room.  Area rugs will also create the illusion of different spaces in large, open floor plans.

An example would be in your kitchen. I've always felt that a dining table needs something under it to really define your kitchen when you have wooden floors.  A braided area rug says "Country Kitchen".  A Cotton Rug in front of your sink and by your kitchen door goes with the country theme and protects the floor.  Country is just an example, as you could do a contemporary area rug under your dining room table as well.

Try adding an area rug to one of your rooms and see how it instantly warms up the space.