I’m working with Manufacturer theme and I’m trying to have one header image for each page I have but I can’t. Does anyone know how to do it?

Also, I don’t know why but in the header I’ve always have the page name and that thing below ‘-> page name’. How can I get rid of it?

Also, I’ve found that I can change the header here:

but it will put the same header on all the pages. ç

I’m very new with wordpress and I’m so lost omg.
Thank you.