Classist, Ethnocentrist, Ageist
While I'll refrain from the whole debate about whether security questions in general "enhance" security, they certainly don't if they are such that people have to stretch to even answer them initially.
These questions are limited, classist, and ethnocentrist, and let's throw in ageist as well: meaning middle-class, middle-age American. First grade teachers, car ownership, remembering a first album or a first concert? Can you imagine someone in, well just about anywhere, answering those questions?
I am middle-class, middle-aged American, and still stretch to remember any of the "first" questions. What would be my first job? One of several crap jobs when I was like 14? Or a first "real" job after college? My first teacher? You mean preschool? Who knows. Where I first kissed? Well, you mean some preteen thing or like tongue? Even a city would be hard to pin down let alone a playground. We travelled. I was slutty. My favorite childhood friend? Well they were all schmucks and I liked them equally. Where did my mother and father meet? Neither ever friggin' told me and I didn't care, since they were only together until I was 5.
Where were you on Jan 1, 2000? Well, a bit embarrassed not to really remember that. 12 years ago. Which means if you're in your 20s you don't remember because you were a kid, if you're over 50 you may not remember because your mind is not cooperating again.