My brother and I went to nursery school or daycare for a little while when I was 3 and he was 2 and my dad was in school and my mom was working. But after a short stint, we stayed home with a babysitter (my parents both worked) until we started elementary school.
I don't think anyone really went to preschool back in the day like they do now. But kids are also expected to know a lot more in kindergarten than we did back then.
Did you go to daycare/preschool?