I am redoing my dining room.  I have been collecting old tin plates,
trays, dishes, an old red metal fork and spoon, etc. in red and
yellow that I will hang on the walls.  My table is old - dark wood. 
My question is what treatment should I use for the walls?  I want a
warm, country feeling.There are many different shades of red and
yellow in the objects I plan to hang.  The floor is hardwood so I also
need
to buy a rug to compliment the walls and furnishings. I am on a
limited budget and will do all the work myself.
Thanks.
Mimi K.

How about a natural burlap wallcovering? Burlap is surprisingly easy
to apply to walls (easier than wallpaper, in my opinion).

A large multicolor country-style braided rug would look nice with the
decor you describe. Or several small throw rugs. You don't want to
cover up too much of that lovely hardwood floor.

You don't want to paint the walls red or yellow - yes, those colors
are warm and inviting but I think it will overpower the room and
you'll lose the appeal of your collections.
Perhaps wainscoating up to a chair rail (you can buy these in sheets
for cheap) then paint the upper part of the wall in a warm creamy
beige color.
Good luck!