I took course 1 and have been selling cakes since then!! It is a very expensive hobby and highly addictive!!!!
I have probably 600 dollars worth of stuff now and I have over 40+ pans...
I did my first wedding cake this past weekend and it was very stressful but the bride loved it!!! I made good money from it too!!
You are going to possibly need the following for course 1:the kit, colors, extracts, cake mixes, icing ingredients (crisco, meringue powder, butter and almond extract, vanilla, powdered sugar), plastic clown heads, a shaped pan of some sort, cupcake liners, bigger spatulas, paper, pen, parchment paper, cake leveler to torte cakes, cake boards, foil, cooling racks and more that I cannot think of right now.
Oh and BTW it is VERY ILLEGAL to sell character cakes that are copyrighted they are only meant for home use and Disney for one is NOTORIUS about busting cake decorators selling thier pans and images, so BE CAREFUL...A cake decorator nearby got caught last year selling a Minnie Mouse cake and she was fined 10,000 bucks ...!!!!