Welcome, neighbor. Please consider 3M or VentureShield protection for the paint. You should be able to increase the fuel economy by blocking the grill. Frost King insulation is color keyed to Magnetic Gray. Don't forget to check & increase the tire pressure. Hope to see you around sometime.
Welcome to PriusChat - There are some very smart people here that can answer all your questions and point you to some really cool resources. This is definitely the smartest car on the road - if for no other reason than the planetary gear. Have you seen the Prius Driving Simulator - very cool tool. Check it out at Prius driving simulator Have a great time! (I hope this link works - if not, google "prius planetary gear, and look for "Prius Driving Simulator.")
tint is 20% rear, 35% sides. my last ride was almost the same color and I had 20% all around and got a ticket after 9 years at 20%. go figure. I think the 35% is a good complement to the magnetic grey. not too dark, but looks nice.