How do I turn off adaptive cruise control on a Nissan?

The air conditioning in my car just died, and a mechanic said my “AC compressor” bought the farm. I don’t really use AC in my car ever, unless it’s super hot outside, so do I need to fix this? Can I drive my car without a working AC compressor?

I just bought a car and while it starts fine, the battery looks a bit old. I don't want to get stranded somewhere, so how do I check the date on a car battery?

Is there an easier way to remove a car from my State Farm policy? I have always gone to my agent's office, but I would like to update my policy remotely this time, if possible.