Incident and Service Request Management vs, Incident Management Toolkit

Answer:
Incident and Service Request Process (https://advisera.com/20000academy/documentation/incident-and-service-request-management-process/ ) is just process description according to ISO 20000. On the other side, Incident Management Toolkit encompasses all you need for Incident management solely.
So, if you need to ensure all relevant processes are implemented on your Service Desk - include Request Fulfillment process as well as Service Asset and Configuration Management process, Change Management process, Problem Management process, Event Management process, Service Desk function, IT Operations Management function, Technical Management function, Application Management function. In such way you will cover most of the operational issues. Rest of the processes - depends how do the service look like. Please check ITIL® Documentation Toolkit (https://advisera.com/20000academy/itil-documentation-toolkit) which includes all mentioned processes and functions.