Check Houzz.com for pictures of finished bathrooms , sometimes they tell you the name of the faucet in the info to the right of the picture. Look for tub fillers in products there too . Here is a link for one of them. Here is a link that might be useful: [https://www.houzz.com/products/led-color-changing-waterfall-wall-mounted-bath-tub-filler-prvw-vr~3278118-Color-Changing-Waterfall-Wall-Mounted-Bath-Tub-Filler-modern-bathroom-faucets-other-metro[(https://www.houzz.com/products/led-color-changing-waterfall-wall-mounted-bath-tub-filler-prvw-vr~3278118)

Painting will not look right and it will not hold up. There are firms that will come in and spray (refinish) your treads and bannister because that is what I did. Then you can paint the spindles. My staircase was similar all one color from 1970s.

I really like that!! You may be right that it is better done in a new build, but it's certainly a question I can run by one of our contractors. Even if we can't do it, you really nailed the look I was hoping for : )) Here is the best I've seen on Houzz, but it's difficult to choose online. https://tinyurl.com/SandedBronzeSquareHandRail

The post I mentioned would not be at the bottom tread so the design of a continuous handrail would have to bypass the post to get to a newel at the bottom tread and there would need to be a guard at the new opening whether it be solid, balusters, etc. At first glance it seems a potentially messy solution. Perhaps the handrail could be at the other side and the guard could terminate at the post. The bottom tread should have had returns at each side. Its looks like a abasement stair in the entryway.