Jesus - no - not at all. Many of the larger, established and good quality publishing houses/companies are exclusively Open Access i.e. SAGE, BioMedical Central (BMC series) etc.
No, it is not same at all. Charges apply for all types of journals including Open Access Journals, why definition of Predatory Journal may be seen.
Predatory Journals take advantage of author's by asking them to publish for a fee without providing peer-review or editing services. Because predatory publishers do not follow the proper academic standards for publishing, they usually offer a quick turnaround on publishing a manuscript...
Not only open access requires funding. Many of high-ranking journals, including Nature and Science, charges for publishing. See https://en.wikipedia.org/wiki/Article_processing_charge for more examples: "for example the Proceedings of the National Academy of Sciences regularly charges $1700 per article, with a surcharge of $1350 for open-access."