Your code has many errors, you got missing "end" and not needed stuff.
try this code,
vehicle = createVehicle ( 496, 2425, -55, 27, 0, 0, 0 )
setElementData(vehicle,"vehicle","car")
setElementData(vehicle, "owner", "Jumper_Mych")
function lockcar ( player )
if (getElementData(vehicle, "vehicle" ) == "car") and ( getElementData(vehicle, "owner" ) == getPlayerName(player) ) then
if isVehicleLocked ( vehicle ) then
setVehicleLocked ( vehicle, false )
outputChatBox("Vehicle unlocked!",player,0,255,0)
else
setVehicleLocked ( vehicle, true )
outputChatBox("Vehicle locked!",player,255,0,0)
end
end
end
function bindLockOnSpawn ( )
bindKey ( source, "l", "down", lockcar )
end
addEventHandler( "onPlayerSpawn", getRootElement(), bindLockOnSpawn )
P.S: Stop saying "Don't copy my code" and so on because your codes always fails