Palmer - an "ISO 45001 tool box kit" sounds like sales speak to me.

If there is as little in place as you suggest, I think I might be tempted to start with HSG65 before making a decision as to whether you want systems etc to conform with ISO 45001, - let alone think about going for accreditation UNLESS there are commercial pressures to do so, e.g. client requirements.

....and even if you do have such pressure, I would be thinking about ISO 9001 first - if you accord with 9001, relatively easy to get systems to accord with 45001 and various other standards. In simplistic terms, all starts with effective document control.  

Use a new name and sell it as a new scheme ;-)

Tool box talks have been intrinsic to workplace communication (except where they are generic).

Picking up the wrong terminology is rife in H&S exampled by my personal pet peeve that a Safety Data Sheet (SDS) is NOT/NEVER/EVER WILL BE a COSHH sheet aka assessment (20 years since the regulations were first published and the construction industry still can't get it right).

You don't need a kit, produce your own tool box talks relevant to your business & relate to the 45001 by showing employee involvement & communication.  They are good to use if you have reviewed a process.