A tire pressure monitoring system (TPMS) is to warn you that at least one or more tires are significantly under-inflated, possibly creating unsafe driving conditions.
We strongly suggest purchasing an installation kit with the purchase of 4 wheels as your OEM wheel hardware may not fit in aftermarket wheels, or the wheel seat may be different.
Lock nuts/bolts are used for theft prevention as they are much more difficult to remove and require a special key.