So, anyone see or remember this show? I used to love it! Anyway, here are my best guesses.

Stacey - ENTJ (or ESTJ with good tert Ne?) - Somewhat imaginative, driven (from what I remember), practical and the voice of reason against Bradley's overactive Ne.
Bradley - ENFP - Easy.
Polly - INTP, INFP or INTJ.
Lance - ESTP
Russel - ISTP
Dil - ESFP
Stacy's Dad - ENTP
Stacy's mum - Don't remember