how to find Profile module
The Profile 2 module isn't in Drupal 7 core yet. You can download it here.

If you'd like to set up user profiles without Profile 2, you can add more fields to the user profile at Administration > Configuration > People > Account Settings > Manage Fields and play around with Panels and Views afterwards.

You can find more information here too:


How can I create user profiles in drupal 7?
How to create a profile page?