Round about 16oz which is a pint.
If she wont drink milk then just make sure she has yogurt, cheese, butter...anything with dairy in/on her food. Some kids just don't like drinking milk, I remember being forced to drink it as a child and it made me gag unless it was ice cold.
I bought some Organix fruit and rice desserts, as well as the Heinz fruity custard as both of those have dairy but don't have added sugar.
We haven't bothered with vitamin tablets as he eats a good mix of foods and plenty of fruit and vegetables.