Can I edit the Autoresponder's email template?

When the application form is submitted, as email is sent with the answers but I wonder if we can add any info to this auto response eg 'Thank you for applying' etc

Hi,

Thank you for reaching out to us. 

Yes, of course, you can customize or edit the email template for the notifications and autoresponder emails. Kindly refer to this detailed guide: How-to-Edit-the-Email-Template-for-Notifications-and-Autoresponders

If you would just like to add a message you can edit a blank row or insert another row at the top or at the bottom. Please refer to my screencast below:

I hope this helps. Let us know if you need further assistance.