Need help with funtion for spawning a vehicle

I need help spawning a car for my gamemode
So far i have the window and the icon but I am unsure what function i could use to make the jeep spawn

So far i have:

self.buggy = vgui.Create( "SpawnIcon", self )
self.buggy:SetModel( "models/buggy.mdl", 0 )
self.buggy:SetIconSize( 64 ) 
self.buggy.DoClick = function() ply:ConCommand("say !car") end


Thanks this really helped