please give the coding for OBJECTS so i can pick up an object. give me also the coding of WEAPONS, so i can carry a weapons with limited ammo, when out of ammo, weapons are still there and needed to search for ammo, , give me also the coding of battle systems, for example, My character enter the bedroom, and there is two zombies, so i need to kill that both, please give me the coding for that, my first project is, The Dead City.

This tutorial should get you started:
https://github.com/ThePix/quest/wiki/The-Zombie-Apocalypse-(on-the-web-version)