dcmd_start(playerid){
SendClientMessage(playerid, COLOR_MESSAGE, "Your engine has been Started");
}

//At top
new Eon[MAX_PLAYERS]; = 0;

//OnPlayerConnect
Eon = 0;

//OnPlayerSpawn
Eon = 0;

//from gunna command
dcmd_start(playerid)
{
         if(Eon == 1) {
                  SendClientMessage(playerid,red,"Engine is already on");
         } else {
                  SendClientMessage(playerid,ACOLOR,"Engine On");
                  TogglePlayerControllable(playerid,1);
                  Eon = 1;
         }
         return 1;
}

//OnPlayerKetStateChange
if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
{
         TogglePlayerControllable(playerid,0);
         SendClientMessage(playerid,COLOR,"/start to turn your engine on");
}