Honestly, she probably won't be able to charge much for initial content, but that will change once she develops a following. The pictures you have are fine, though I'd consider removing the glare in a couple of them, as well as have one of her in some form of bondage on the tickling side of things, to give people an idea of what she'll be tickled in. Pictures can just be of anything involving her feet/tickling. Videos... little bit trickier, but following the same principles.
I'd follow Comfort Eagle's advice though, and make sure you've got some sort of preview for videos, to give people an idea on what they're buying.