It was a short-lived 1990 series based on the 1989 Ron Howard movie starring Steve Martin & Mary SteenBurgen as the parents. In the series, Ed Begley Jr. played the dad and the kids were played by very young Leonardo DiCaprio, Thora Birch, & David Arquette!:talk:

I have a picture of the cast. They aired the show on a cable channel a few years ago.

Yes.

yes
the only episode i remember is the one where the buckman children have chicken pox.
it seem like a good show that should've ran atleast 5 years