I hope you are well today and thank you for your questions.
How can I make the dates of the tickets look exactly the day they were published and not say 3 minutes ago 1 week ago that they say exactly the date
You can achieve this from theme blog post settings as shown in the attached screenshots.
and how I can activate the template (license)
If you have purchased the theme then you have already got license activation.
Please find more information about it on the following pages.