The Kit # TM56FR with 10 sensors you found is going to be the largest amount of sensors that come with a unit as this is typically the most common setup. You can easily add additional Sensors # TM-2Brass to fit all your tires.
I would recommend going with the flow through Kit # TM98FR and 3 sets of their Sensors # TM66FR as then you will not need the wrench included with the sensors to remove them every time you need to add air to your tires. view full answer...
No, you do not! The repeater included with the iN-Command TPMS item # NCTP100 you were looking at has a range of 100' front the monitor to the sensors. view full answer...