As the NQ s part of the CPL training, you will have a NQ as part of your CPL license. As far as I am aware, you don't need to have it on your PPL license prior to issue of CPL, just the training requirments.
Once you have that shiny blue book, you will have a NQ. As for keeping current, in order to take passengers you need at least one t/o and landing at night (as part of your 3 t/o and landings) in the past 90 days. Unless you have a valid IR