My friend gave me their old phone, how do I get my phones back up on to the new phone

You should erase everything on the phone your friend gave you if they didn't.

Your friend should have followed this procedure before giving you the phone:

What to do before you sell or give away your iPhone, iPad, or iPod touch - Apple Support

If they didn't complete all of those steps, you will have issues.

Start here:

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

See: Transfer content from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support