All Vehicles can have there colour changed with:
this setObjectTextureglobal [0, "#(rgb,8,8,3)color(1,0,0,1)"];
[img]https://i.gyazo.com/ecd404ec763a65fa8fc9d977c74b2774.gif[/img]

RGBA Information:
https://community.bistudio.com/wiki/Procedural_Textures

To change the vehicles base texture type use the following commands:
//Dusty
this setObjectMaterialGlobal[0, "RT_70Series\toyota_j79\textures\Dusty\Main_Paint.rvmat"];
//Dirty
this setObjectMaterialGlobal[0, "RT_70Series\toyota_j79\textures\Dirty\Main_Paint.rvmat"];
//Used
this setObjectMaterialGlobal[0, "RT_70Series\toyota_j79\textures\Used\Main_Paint.rvmat"];
//New
this setObjectMaterialGlobal[0, "RT_70Series\toyota_j79\textures\New\Main_Paint.rvmat"];


Changing the numberplate update the following replacing "x.paa" with the letter or number you want this can only be a single digit.
this setObjectTextureglobal [2, "rt_70series\common\cytech\plates\letters_white\x.paa"];
this setObjectTextureglobal [3, "rt_70series\common\cytech\plates\letters_white\x.paa"];
this setObjectTextureglobal [5, "rt_70series\common\cytech\plates\letters_white\x.paa"];
this setObjectTextureglobal [6, "rt_70series\common\cytech\plates\letters_white\x.paa"];
this setObjectTextureglobal [7, "rt_70series\common\cytech\plates\letters_white\x.paa"];
this setObjectTextureglobal [8, "rt_70series\common\cytech\plates\letters_white\x.paa"];