What do I do if my Ford Focus door won’t unlock with the key?

I moved out of the city to the suburbs about a year ago, and I’m finally ready to buy my first car. Since I didn’t need a car in the city and drove sparingly, I’m not exactly sure what to look for. My neighbor has a Jetta that he wants to sell, but I’m not sure if that’s a good option. Is the VW Jetta a solid car for a first-time driver?

I found bed bugs in my apartment and my landlord says they aren’t responsible for taking care of it. They claim there weren’t any bed bugs when I moved in, so I must have brought them in. I live in a big building, so I don’t know how my landlord can prove this. How do landlords prove you brought in bed bugs?

How heavy are most standard car engines? I think the weight of my engine may be slowing down my car, but I don’t know if it’s heavier than any other car engine.