Pump up the tires to 40-45, make sure the battery is fully charged after a good farewell run and turn the battery switch off. I have been doing this for years as I leave my 512TR in FL for the summer. Since its in humid Florida, I also put buckets of water absorber in it. Starts up every fall on a few cranks.
TR's are very good in the snow. Without anti skid brakes and traction control they work fine. Unless the snow gets over 12 inches you don't need snows. Make sure you have plenty of washer fluid. I also found keeping a small sponge wrapped in a chamois in the side compartment helped to augment the defroster which below 0 deg. f is marginal. Make sure not to fill tank unless you're going to keep driving or park in warm garage as they do tend to gas line freezing. I added dry gas if I filled up at -10 deg f or lower. Leave cardboard under wiper so it dosen't freeze to windshield if you leave it out overnight. Make sure battery is fully charged. Lower tire PSI 2 pounds front and rear. After starting allow to idle until belts stop squeaking. That's about it.
I love hearing Napolis' daily driver TR stories!!! I have always thought a TR would do ok in the snow with the mid-engine design. I would think when the snow got deep the front spoiler would start working as a snow plow.