Yes, answer keys should be included. They are usually divided up and placed at the end of the volume to which they apply. So if Chapter 2 is in volume 3, the answer key for Chapter 2 would be at the end of volume 3.
Teacher materials are a bit different - that is usually something that the requestor must specify. Some want the teacher materials included and some don't. It depends on how the book will be used. I suggest you request clarification from the person paying for the transcription.