FTP or sending localhost wordpress site to someone

He will have to give you the details of how to use ftp to send something to him.

The BackupWordPress plugin will let you make a complete copy of your site that you can send him.

However, it will usually not work to just copy a site. WP stores URL’s and paths in serialized form that need to be changed in the database. You must use a special tool to make these changes properly. Here is a link to one such tool: https://interconnectit.com/products/search-and-replace-for-wordpress-databases/