Are there any official pastoral handbooks that are given to seminarians with Q&A type formatting to help pastors, and if so, are they available for laypeople to purchase?
While it does not feature a question-and-answer format, The Shepherd Under Christ is a book on practical theology that students at Wisconsin Lutheran Seminary have been using for quite a number of years.
The book is available for purchase from Northwestern Publishing House (NPH).
This link will take you to the appropriate section of NPH’s website where you can obtain more information about the book.
Doctor of Souls is a recent publication that addresses more contemporary ministry subjects.