You can use special mail tags in your Contact Form 7 Message Body, here:

Full list of tags you can use can be found here: https://contactform7.com/special-mail-tags/

The most useful for single car page Message Body:

[_post_id] — Listing ID

[_post_title] — Listing title

[_post_url] — Listing link

[_url] — Listing URL

[_post_author] — User Name

[_post_author_email] — User Email