Forms elements can be accessed in email templates.

To add Forms values to emails sent to client (on account creation for example) you need to:

Add variable name to form element:

Go to Products & Services → {Your Orderpage} → {Related Product} → Forms, add or edit current form element, and under Advanced tab enter variable name (without spaces)

Edit related email template:

Go to Settings → Email Templates and edit email template you wish to add form element into.

You can access:

{$service.forms.YOURVARIABLE.value} - contains qty or value for input fields
{$service.forms.YOURVARIABLE.value_name} - contains picked value from dropdown, radio box