"streaked" hair, today I think is called 'highlighted'. The idea behind highlighting is that in nature hair color is not all one shade; highlighting of 'colored' hair is meant to mirror that. Remember Liz Taylor? No highlighting there!

I don't remember their feet - I haven't seen the show much - but they, after all, do live in NYC and are hip, fashionable, upwardly mobile young women so I would guess they wore high heels, at least in public. (Oh, I do remember bare legs and sandals.)

Photo - (But Not Winona)