Yes and No. Citywalk is free except for the clubs at night. You do not have to enter the parks. You will have to pay for parking though unless you come after 6:00 PM when parking in free.
If you plan on entering the clubs using the Citywalk part of your park tickets though, it will start the countdown on your 14 day tickets. As long as you don't use the park tickets when you go to Citywalk, it will be fine. I hope this makes sense. Sometimes, people use their tickets at Citywalk on their 7 day tickets and find out the tickets are showing expired sooner than they expected. This can usually be fixed at guest services because they can see that the entry was at Citywalk and not an entry into the park. But it's easier on you just to avoid having the tickets expire early.
So eat at the restaurants, go to the movies, and shop. But I'd skip the clubs as they will scan your tickets there.