Wow, you need a new gas cap!
Hi, the throttle problems seems pretty fixed.. sprayed wd40 in the spring opening the main valve and then the motor oil, while keeping opening and closing, and now seems fine!That one you aren’t sure about is your choke cable. Take it out with a wrench, I think 12mm). It’s plastic, so be careful. There should be a spring and plunger on the end of the cable. They often get corroded and stuck in place.