Nissan Armada Electrical

When I Turn The Key To Crank It Makes The Clicking Noise Which Automatically Tells Me It's The Battery, But That Was Replaced Close To...

How Many Amps Is The Fusible Link For The Main Distribution Power To Fuse Box Located In The Front Engine Compartment ? Is It Very Expensive...

Both Of My Keys For This Car Have Been Stolen.. What Part Exactly Do I Need To Replace To Switch Out Keys? Is There More Than One Part Or A...