1: you can get sensors that you can program to match the factory sensors however you have to buy those sensors and the pad that works with them to program up the sensor id. the ez sensors and ez sensor pads are what would be needed
The only reason you would go to the dealership is if you got regular tpms sensors and wanted those programmed into your car.
The 3rd option is the ateq quickset device. You would purchase regular tpms sensors with your wheels and program the computer in your car yourself therefore you would not need to go to the dealership. The catch is the ateq software is tempermental and you should get the latest version from ateq site. I used this option on my last car a 2009 accord whenever I switched tires for summer and winter.
2: ignore it or do what zeeper said.
Hey zeeper If I pass you on 87 send a shout out, heading to schenectady in a bit