New Tires for New Owner

We have been Prius owners for a short period of time now. Based on postings and past experience with OEM tires, we are planning to replace the OEM Goodyear Integrity tires with ComforTreds. If we do so, given that we have the tire pressure monitoring system on our Prius, would we be needing to incur costs to have the pressure monitoring system re-activated, or would a Sears or other tire dealer be doing so as standard procedure? The Sears store has a sale on the tire for $82/tire. We would be prepared to purchase the tires at Sears and have them mounted at the Toyota dealer if that will be a better process in regard to the monitoring system sensors. Thanks for your feedback and insights with this matter.