Identifier on form

I would like to send some kind of identifier within the form a user fills in.
Let’s say I have a catalog of cars and the user requests info about a certain car. When the user clicks the form button and enters his name and email address, I would like to send info (name) about that specific car in the email the admin receives.

Is that (already) possible?

Yep, on the right side of the builder, you should see Column Values components. Those are the values from the previous screen where you clicked on the Form Button. If you are using an email button, you can specify the subject, body, To, etc. You could even use a Template Column to build out the body of an email with all the information you need.