How do you check the tire pressure on a Volkswagen Tiguan?

What is a good way to add a car to my GEICO insurance policy? I'd like to add a new car to my existing policy, but I can't quite figure out how.

I test drove a certified pre-owned vehicle at a car dealership and loved it. I found the same vehicle on Carvana for $2,000 less, so I'm thinking of pulling the trigger. The only problem is that Carvana has a much higher interest rate than the dealership. Is Carvana a good dealer to work with? Or should I look elsewhere?

I want to start collecting cars and I'm not sure how insurance works for that. Are there special policies? Can I insure all of my vehicles on one policy, or do I need separate policies for each one?