You should definitely have a run. There are countless reasons why you'd want to confine them to a run even if you plan to free range them.
I prefer a walk in style run that had 15 sq ft per bird. Others will say 10 sq ft is enough but when you see the chickens in that much space you realize it really isn't.
Hi and welcome to BYC! We're glad you joined us!
It looks like you have a good start on your coop! If you need any help with anything feel free to ask!