few questions about 2008 ford focus LT

[ToyotaCorolla]

1. The engine is a Duratec-HE 2.0L. It says on the owner manual put RON 95, and on the service manual it say RON 91. Doesn't have a sticker on the fuel cover. Which one is it?

2. How to get rid of these bubble wrap on the back of the car? Tried looking for some plastic film cannot find it. Not looking hard enough?



3. Any solutions to the weak reverse light? You cannot see anything reversing in the dark!

4. What's this high pitch sound from 3 seconds seconds. What's shutting down?
https://www.youtube.com/shorts/obC62u5CEvY

5. If I accidental stall the engine, it just won't start for the next 2 minutes, its cranks but engine won't start. After 2 minutes it will start again. What's going on?