What sort of kit would you need to get started, do you think?
I don't have a kit, per se, but a lot of individual tools: a little rolling pin, a cel board, dog bone (modelling tool), ball end (modelling tool), cones, veining tools, leaf shapers, various different size and shapes of flower cutters, leaf cutters, leaf veiners, edible glue, colours (powder and liquid), styrofoam block (for drying), etc. Honestly, you can keep accumulating stuff so easily!!
I'd say it depends on what you want to make. To make roses and leaves, I'd need a rolling pin, cel board, dog bone, flower and leaf cutters and colours. I think that's probably a bare minimum.