It might work for a slow charge. RT charger is 24W; Pro charger is 48W and 5W of that is dedicated to USB accessory charging. I'm assuming the voltage output is the same and that the connectors are interchangeable.
I think it actually should. The battery has a different capacity but if the size and shape of the plug are the same there shouldn't be an issue. MS has already created their own charging standard and I doubt they would make a second one. Surface Pro will almost assuredly use the same 12V @ 2A charger.
Not sure whom you're asking, but I will use the SanDisk 64GB Mobile Ultra MicroSDXC Class 10 Memory Card. I already have one in my RT, so decided to stick with the same thing for the Pro. I got it from Amazon, and it's already here waiting.