You can make your way to a dealer ship around LS and Purchase your very own car or bike.
once bought, make your way to SF docks to pick it up
(if Myself/JoKeR or Anthony are online feel free to ask them nicely to teleport your car to you)
you can tune your car at a transfender but remember to /save car to save the modifications.
then head to a dealership to /v color to set a permanent color (also /savecar)
if you own a house, /v park and /v lock it there
IF you don't have a house, maybe just find a parking lot where you can park it
here are colour ID's