Well Saku, some considerations.
As you play only offline, you should take in account that some maps, mainly on the Eastern Front, are not officially available as Single Player. But you could take a look on the Single Player section here on the forums, some of these are available in non-official packs.
As the vehicles and weapons, it depends on the map. As ALAN said, you must find them! Take a look around the spawn points, you'll find some kits hanging around... or maybe in towers and high places, who knows...