as said before, she needs muscles in her neck, but that can easily change by working her in frame and all.
besides her neck, she looks to be pretty decent.
It does look like she toes in, her pasturns seem fairly straight to me, though with better pictures, it could all change.
16 is a great age too. She still has plenty years left, though she shouldn't go throw any problems that a younger horse might.
If you like her, I would go over and check her out in person and ride her if you feel comfortable :)