Hello, @VDinev,
1.. Actually, there is no option in the theme to custom set up Facebook ads, Google Ads, etc. It requires customization also, You can use a third-party plugin for this at your own risk. Furthermore, I have found an article on it, here is the link to it:
https://www.wpbeginner.com/beginners-guide/how-to-add-google-adsense-to-your-wordpress-site/
https://www.clickminded.com/facebook-pixel-wordpress/
I hope it helps.
2.. The pages are in the Dashboard >> Pages >> All Pages.
Regards 8Themes Team.