Security System

If it's a "factory equipped" Toyota anti-theft system, simply using your key and remote (if applicable) should be sufficient to access and start the vehicle. Ensure a properly programmed key is being used. Make sure no vehicle modifications have been done that can interrupt the relationship between the programmed key and the vehicle. Are you certain it's a security system issue? Is it possible the battery, for example, could be too weak to start the vehicle? Hands on testing is needed: Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops