What is the lowest temperature of the refrigerator and freezer?

Dear customer, the lowest temperature of the freezer is -18 ℃, and the refrigerator is 5 ℃.

On the bottom of the fridge is that a bin that slides in & out or just 2 bars across the front?

They are just bars that would hold items from slipping forward. The 1/2 shelf above it is removable for tall items and the top.Shelf is also removable

Why is this refrigerator running all day? The engine is off?

When the fridge/freezer reaches the set temperature, the thermostat will trigger the compressor to shut off. When the temperature inside the unit rises the thermostat will trigger the compressor to turn back on.

If your refrigerator cannot use a surge protector, how can you protect yourself from the impact of an electrical storm?

You can use a surge protector - it is not recommended that the refrigerator be powered by solar cells/DC batteries via an inverter or a generator.

I read in a power outage, this fridge needs to be manually restarted. How do you manually restart a fridge?

If the fridge compressor does not turn on after a power failure - turn the temperature dial inside to 0 and then back to your preferred temperature.