Third Person Shooter

Ok, so basically, I want to make a Third Person Shooter similar to this one ホムラコンバット デモプレイ - YouTube is there any tutorials on:

  1. How to make the character aim (where the mouse is)
  2. How to make an inventory bar at the bottom (Similar to minecraft) For the weapons

Here is the Unity Third person Tutorial

I see a demo, not a tutorial. There is a difference. Does not do a person no good if they dont already know how to do this then to give them a demo. What are they looking for, what are the scripts, where do things go etc etc… I am a newbie and I have no use for a demo. I dont care how it is setup if I dont know how to start the project. Someone needs to explain this instead of throwing this out there as a tutorial answer which it is not.