Wow! You've got an impressive gallery there Hannah!
This is oak;
This is pine;
The shoe moulding that matches this can still be bought. The base board in the picture looks like it's finished with orange shellac. You would be better off to try to match the color with a more modern finish.
Time to put some outriggers in the yard and prop the ceiling/roof up so you can replace that floor. You can use treated wood for the frame and then use T&G pine for the floor;
This floor looks like pine. I'd have to see a closer shot to really know;
You've got a JOB there. You better stick around and stay in touch!
Welcome to the forum,
And to your money pit.