Thinking about moving to LA with a family?

I'm an English guy currently living in China with my Chinese wife and 4 year old boy. I have been offered a job in LA. I don't know anything about LA or any of the cities or neighbourhoods. The office is located downtown on south hill street. Would it be worth moving with a salary level of $75,000? Where is a good place to live with a family that is convenient for the office? What kind of lifestyle could we expect? And finally what are the education options? Thanks.