There is a new ML Deformer sample pack available to download on the marketplace. To create training data, for cloth, it’s advised to use nCloth in Maya. For skeleton and muscle Houdini is the way to go, but you can use also Ziva if you have it( quite pricey). Note there is no specific toolset, whatever works and outputs the best results. Good cloth simulation is much easier to produce, but muscles are quite complex to create a good system and simulate it.