Want to have an Archive Page...

But If I import the marketer template. My other page’s design will be deleted, right?

The current customizer settings will be overwritten but it can be reverted back if you remove the imported template.

The home page will be replaced by a dummy home page template from the imported template as well but the old home page will still be on the Page list. Reverting back the imported template should revert the old home page as well. :D

The CSS I got understand but how can I implement the time date filter as that website has and I can’t find something like that in marketer…

I don't see any date/time filter on WPBeginner's archive pages. PCgamer has one but that seems custom developed. You may need to hire a developer for this or get a plugin that does the same functionality. :)

And can I import these site templates for any one of my pages?

Unfortunately not. The importation is applied site-wide.

Oh, now I am fully clear, Thank you.

I am happy with GP Premium Services...Thank you.

No problem. Glad to be of any help.

Feel free to open new topics if you have other questions. :)