That is very small ,room for only sink and toilet,so I say white toilet and a small sink with open storage underneath,or a floating sink

It appears it's already plumbed in this configuration...
I would find the powder room you love the most on houzz, source the fixtures and finishes, and copy it.

I would also see if you can have the door reinstalled to swing the other way. The way it opens now, the first thing you'll see is the toilet. I'd rather have a view of the vanity and a great mirror and chandelier when the door is open.

Thanks for your response! I think it's a different configuration though than in the picture above.