We had a farmhouse with douglas fir floors. They were beautiful and felt great underfoot. One thing to keep in mind, though. Fir is a soft wood that scratches easily. If you have pets or anyone who wears either high heels or shoes with tread that picks up pebbles I would consider going with a natural finish, rather than ebony. A very dark stain that got scratched or nicked would almost certainly show the original (much lighter) natural color.
I love wood ceilings... I'm sitting in a room with hemlock T&G right now! As long as you keep the color light and natural, I think the wood run across the width of the room could make your livingroom look wider.
It looks like your trim may have shellac on it, which becomes very amber with age. Either that or someone really liked that dark red stain. If you'd like to keep the natural wood trim but don't like the red, I think you're probably looking a a finish removal job. If you're DIY-ing and don't mind spending a lot of time, you could probably get some good results, but you might find hiring someone to do that work is cost-prohibitive.
Q