Expenses details for family of three members

Dear Reader, I am planning to relocate to Barcelona for a minimum tenure of an year(could be extended).
I will be accompanied by my spouse and my son who is 4.8 years old.
Request you to please help in suggesting - an average expenses for my family, good locality and English school fee structure.
Thanks,
Praveen

Welcome to the forum  :)

Take the time to read through other threads here on the forum for information. Check out www.numbeo.com for living costs.  Also click on handy tools at the top of this page and open the expat guide which has helpful information.