Can I Get a 2nd Hand PS4, Hook it up and Start Playing PS4 Games out of the Case Straitaway and Offline like PS3?

I Dont have Internet at the Moment but will get it Very Soon. I was Told from a Gaming Store that Unless I Have Internet, its a WASTE OF TIME BUYING A PS4, as it WORKS BETTER on Internet CONNECTION. All Answers Appreciated!. Thankyou.
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