What do you do in your free time?
In my free time I like to go walking, go swimming or go to the cinema with my friends.
Only need to say I once in a list of activitites. Also you would say "or" rather than "and" unless you do the activities at the same time.
In my free time I go for a walk, I go swimming and I go to the cinema with my friends.
"go for a walk" is fine