Artisan comes with Laravel by default, if your php command works fine, then the only thing you need to do is to navigate to the project's root folder. The root folder is the parent folder of the app folder. For example:
cd c:\Program Files\xampp\htdocs\your-project-name
Now the php artisan list command should work fine, because PHP runs the file called artisan in the project's folder.
Hope this help!!