After the upgrade from AEM6.1 to AEM6.4, the issue happened.
The editToolbar can only appear after editing the component from left sidePanel.
The component outside of the parsys (The resource type isn't parbase) can be edit:
For the newly created page, we cannot edit it because there is no component is dragged/added.
<cq:include script="/libs/wcm/core/components/init/init.jsp"/> was written in the head.jsp
This could be because of the dynamic template policy.
Are you using static or dynamic templates?