Help ID Dining Table and Chairs  

Sorry, I don't know why the pics are upside down.

The wood (table) looks more like ash(?),very typical solid wood and veneers used in that blonde or 'borax' modern style of the 1940's -50's.  Not a designer or pedigreed set but are usually well made compared to todaty's store bought furniture  The side profile of the chair (without the boomerang arms and grid back) looks like a copy/look alike of the Risom side chair by Knoll from 1943.
The set you have is not very valuable but very useful.  It is up to you to refinish and reupholster if you have the time and skills but for me it will look best in the original aged blonde finish.

What minimoma said.  I'd just add that that set will be very difficult to refinish with a stain because it has so many corners and angles.  In order for stain to adhere, you have to get all the original finish off, and then stain will tend to collect in the corners and look darker.  It will be obvious that it's a stained piece instead of looking like a naturally dark wood species (which I think is always the goal of staining, no?)
I would clean it up and redo the seats in a fabric that is not so close in tone and color to the wood.  That will go a long way toward making it look good again.  That fabric does nothing for the wood.  Then just live with it for awhile and you may find that you really like the wood as is.  If not, you've got a decent dining room set to resell and put the money toward something you love that doesn't need a ton of work to be transformed first.

I agree in the strongest terms with what's been said.
Not to denigrate the poster's wishes or tastes, but the urge to create (or re-create ?) so often takes the form of "doing something" -- anything -- to an existing object.  As a child I got a new bike and almost immediately began looking for  something to add.  I settled on a handlebar bell, which I ordered from a catalog.  I proudly attached it when it arrived.  Did I need a bell ?  I doubt that it rang more than once or twice after the first week . . .
The prep issue alone, a necessary prelude to a satisfactory stain job, would daunt me -- and I'm a cabinetmaker.  If the top surface needs refinishing, I'd sand it only to the extent necessary to remove scratches, then carefully mask the edges and apply clear finish -- so that the other surfaces would retain their original patina. Better would be to leave it entirely alone, apart from a cleaning if necessary.
New upholstery for the chairs would be a most satisfying move, I expect. Thanks for letting us see your new acquisition. (I seem to recognize that table base -- perhaps a known design was the influence for this handsome set ?)