How to make character movement and combat against AI?

Question

JavaScript

Hello. Please tell me how to properly move a 3d character on the terrain and interact with AI.
As for movement: do I need Rigidbody, collider and something else and how to use it.
In terms of combat: is it worth doing damage to the character or AI if the collider of a weapon or some kind of bullet connected with the enemy? If not, what is the best way?
Thanks in advance.

Answer 1

https://unity3d.com/learn/resources/downloads
Download Survival Shooter tutorial