Do I need anything more than drylok in my basement?
I would not install any vapor barrier in a basement. If you do paint the walls make you use a paint that will allow moisture to transpire through the wall.

Mother Nature has an unlimited supply of moisture so there is no way you can prevent it from entering the basement. You just want to make sure it is allowed to dry to the inside. If you trap it with a barrier it will cause mold, mildew and eventually fail.

Read the articles on this site regarding vapor barriers. Especially in basements. Like this article from fine homebuilding reprinted here. The number one mistake is "One: Vapor barriers on basement insulation will rot your walls".

I would just paint the walls with a flat latex and stain the floor. Or you could stain both and let the walls breathe even more.

Edit from tahwos' comment below: Should probably add the benefit of properly graded exterior slope, back-fill that can drain adequately, and working gutters, to round out this answer. A correctly installed and maintained basement, is a dry basement.

Good luck!