Which version of Kentico will you be using? License? The forms have an ability to send an email out after the form is submitted, so may be worth looking at the Autoresponder section of the form and see what is there. There are some more complex things that you can do without having to code, but some of those depend on licenses. There is also a place where you can attach items as well in the autoresponder. What is the attachment going to contain? Does it need to be based on the form inputs?