Blend Shape-based Facial Rigging

How could I animate a model that has been created from high-fidelity scans with blend shape-based facial rigs?

Should I find a set of Unity plug-ins and packages that separately do speech synthesis, lip sync, cheek movement, eye rolling, etc...?

I know this is a broad question, but I would appreciate some pointers to help me understand how I can create verbal & non-verbal behaviors in such a model when I open it in Unity in order to create a primitive virtual human.