Once you have a license you can have all the guns you like pretty much...within reason. No automatics. lots of gun shops so buying them is easy once you have the licence.
yes the course covers all types of guns. hand, shot, low and high calibre.
Just have to say what you want when booking the course and you fire all of them on the same day.
The weapon can only be accessed by the person that the weapon is registered to. No one els You can register the same gun on multiple licences though.