how to make shiny figures for cake decoration?
These figures are probably made with fondant. 

I think the figures are handshaped. There are plenty of tutorials. You can even look for tutorials working with modelling clay. 
Basically you only need a rolling pin, a knife and tweezers. Cans, forks, any food-safe utensil that has an interesting pattern are useful. Of course there are special molds for fondant but I don't think that you need them unless you want to make fancy things like laces. You can buy molds online but also in some larger hardware stores, supermarktes, or gift shops. It depends on where you are located.

Fondant is quite matt. To make fondant shiny you can 


hold the fondant over steam or
apply shortening,
egg whites,
corn syrup, or
alcohol on the surface