They are probably made of fondant and/or gumpaste. The charge for the cake would depend on flavors, ingredients used, time spent decorating, etc. HTH
I've done a YoGabbaGabba cake, but I provided the background only. You can not make those figures and sell the cake. If it's for your family or a gift you're OK, but otherwise those are copyrighted.
looks like its either gumpaste/fondant or candy melts