When is minecraft cars coming?

Cars and aeroplanes will never be added or is very unlikely… But there are many mods which include cars and aeroplanes, you just need to search for them.

There are mods for it, but Minecraft is just blocks mostly.
Working cars would be… Well not suited for this game.

Never, because its too much for minecraft!

There are PC mods for such things, but it is doubtful they will ever be added to basic Minecraft.