Where can I find statistical information?

Question

Database

Hello,
I have an idea to launch my application step by step. There are forces, there is an idea, there is a base.
Need a solution for this question:
Where can I find statistical information? I need an Open Source source, a database
What information I'm looking for:
1) Segments of the population and what they buy
2) Interests of people, what they like
3) What people use, their age
In general, we need an open source database with statistical information.
I'm more interested in text infa: Woman 35-40 years old, buys shoes. Guy 25+, buys a playstation
I would be very happy with any advice, it is very necessary) Help me make my dream come true!
I'm sure someone once touched this issue and ran into the search for arrays of information in the public domain!
Thank you!