Fuel, misfire, vacuum leak?

When I got the car a year ago it had a bad smell of gasoline. Just on the outside. But I replaced my fuel canister, and it still smells. I ran the fuel injector cleaner through it, and it still smells.
But now I am having serious issues with my car. I had a mobile mechanic come and repair my radiator after a dolly fell out of the back of a truck and all fluids poured out. I also had the spark plugs fixed and O2 sensors I believed. I can’t reach the mechanic anymore but am stuck with my car not able to brake randomly sputtering and jerking. Having a hard time starting and making a whining noise under the hood in the back right. I was told by someone I have a vacuum leak and a misfire. What do I need to do to know specifically without going to a shop? I have a little experience with cars from my family. But I no longer have any family and I’m in the hole because of my break down with the car. I’ll attach a video of how it sounds and later how it drives.
Side question, my instrument cluster went out and I tried the fuses, but it still isn’t working?