As to your original question, I must point out that your "question" does not explain the "why" behind it at all. It's as though you've jumped to some conclusion about the right way to do something based on a certain amount of information/logic/thinking. And you're asking us to tell you how to do that "conclusion". Thus, you're getting feedback telling you that your "conclusion" is ill-advised, mainly because what you're asking for is how to steal ... and you won't get that sort of thing around here.
You'd be better off explaining what problem you're encountering and needing to solve. Then you might find some creative and legally-acceptable solutions.
Nevertheless, if you believe that stealing content from another site/publisher is what you must do, then the first criteria is exactly what the others have been telling you: Unless you have express permission to steal content from another site, you best not do it.
Assuming you've got permission, you'll have to write custom code to go and scrape the content from that other website's pages. Or get their webmaster to "give" you the content.
If you don't possess the skills to do the custom coding yourself, feel free to post in the Commercial Help Wanted area of the forum to hire someone to do a full needs assessment and write the required code.