Coding help

Hey, so i have a DarkRP server and everything is kinda finish exept 3 things, 1.i dont know how to code which weapons a gun dealer can sell 2.how to let people buy entites in the f4 menu [I had the play to add some defense lmg's or traps] and 3. how to add a new mayor since i want to give him an other skin etc....so if you know how to do it i would love to get it from you guys !

I'd recommend taking a look at the DarkRP wiki, it has everything listed there for what you're looking for.

https://wiki.darkrp.com/index.php/Main_Page

Specificallyhttps://wiki.darkrp.com/index.php/DarkRP:CustomShipmentFields for your gun dealer problem

Also I'd recommend taking a look at the Gmod wiki and looking at code examples to help you with any Lua problems you may have

https://wiki.garrysmod.com/page/Main_Page

If you're STILL having trouble after all that, there are DarkRP & Gmod coding discords out there that you can join and I'm sure that there'll be people there that can help ya