Is it permissible to place an advertisement for a car image on my website if the page to which the advertisement directs contains images of unveiled women, whether the unveiled woman is part of the main advertisement or a small image in one of the corners of the page, or if the main page of the website contains unveiled women while the advertisement directs to a sub-page free of them?

There is no harm in advertising permissible goods and directing the visitor to a page free of Sharia prohibitions. However, promoting something permissible that leads to a website containing forbidden images is not prohibited unless the website is pornographic or predominantly evil, because the prevalence of immodest images has become widespread, and preventing their advertisement would cause hardship. One should lower their gaze from forbidden things.