Hello adam1
Please add this CSS to adjust the gap between the header image and breadcrumbs
#banner-image {
padding: 150px 0 0;
}
Just change the number in the place of 150 to adjust as per your requirement
To add this CSS, Go to Admin Panel >> Appearance >> Customize >> Additional CSS, there just add above CSS and then published
About the page content, can you please send a screenshot with the marks? It would be easy to figure out and give you CSS
Have a great day
Regards,
Psink