Q: I do not want to have thumbnails on my slider. If I buy the wowslider, can I put image buttons to check the slide inside my slider?
A: There is no such feature in wowslider.
But you can try to do the following:
Go to Gallery->Properties->General
-check bullet navigation Filmstrip - bottom
-uncheck "auto play slideshow" option
-publish the slider and change images in the generated folder data1/tooltips into images for the buttons with the same size.