Sorry for the late reply.
I'm affraid that, our extension won't feed your needs:
1 - Yes users can have one or more lists and add products to it.
2 - No a quantity can not be set to the items added to list
3 - and No, unable to see how many have been purchased.
There is a feature we want to implement in a near future is the deduction/ item removal after an item from a wishlist is purchased.
Once this wll be completed, it will be easy to implement the quantity options.
But for now I must say No.