You have to prepare the morph targets in a content creation tool like Blender for each model. The problem is that ColladaLoader does not support loading morph targets. I suggest you switch to glTF and GLTFLoader which will also reduce the startup time of your app. glTF produces smaller files than Collada and is way faster to parse. More information about glTF usage in three.js right here.
AFAIK, not in the three.js repository. But the Blender exporter should be able to export both morph target and skeleton animations.