A: Yes! I use it on our plank flooring all the time.
A: In all honesty, my corded Shark works better than my expensive cordless Dyson. I haven't been happy with the Dyson since I bought it. Doesn't suck everything up, battery dies quickly, etc.
A: IZ531H - This is a Target exclusive and will not appear on the Shark website. More than likely if you need accessories or parts, you will need to call them directly. I think the best match is the Shark® Vertex™ Pro Lightweight Cordless Stick Vacuum. But remember this is a Target exclusive and is designed with input from Target.