Got a picture of them? Are they smooth or checkered, Smooth is easier.
Basicly, if they are some hard wood you need to strip the old finish , lightly sand if needed, stain if you want a new or different color then seal with either a oil or poly finish.

If it is a hardwood, after stripping with something like Formbys refinisher (Parks makes a much cheaper) and some super fine steel wool, the natural wood finish will show. Then lightly sand and finish with tung oil (Birchwoods True oil is good)

OH heck, just send them to me, I like working with wood.