1: You can't do it in a easy way, but it is possible by disabling the fire control: toggleControl.
2: You can use my "extra_health" resource to increase the player health: https://community.multitheftauto.com/in ... ls&id=5195
3: You can, you can check game time using getTime and a timer ( setTimer ) to do it constantly.
5: Well, you can do pretty much everything you want, if you have the knowledge to do it.