To get symbol libs added automatically you need to add them to the template project. (This is located in the kicad system directory. You will need admin rights for this.)
For footprints just put them into the fp-lib-table using the library wizard.
If you use stuff in multiple projects you can create a template project and create your new project from this template.
For schematic you can also use hierarchical sheets and simply copy the file into your new project. (Creating a hierarchical sheet with an existing file name adds a new instance of this sheet into your project.)
For pcb you can start pcb_new in standalone and use append board.