It was possible in Pages 4 (Pages '09) where the checkbox was "First page (of the section) is different," and you could leave the header or footer empty on that page, or accomplish what you want by leaving the header empty, but setting the Footer to the same content as the page 2 footer. That feature, along with more than 100 others wasn't included in the "new" Pages when it was completely rewritten for version 5. Several of the 'missing' features have since returned, but from your question, I gather this isn't one of them.
You can, though, get much the same effect by copying the Footer contents, pasting them into a Text box, placing the text box, containing those contents in front of the hidden Footer, then clicking the check box to hide the header and footer on that page.
Bottom of Page 1, with text box containing footer text for thst section pasted in front of (still visible) footer for that page. (The text box was deliberately misaligned slightly to allow seeing both the text and the contents of the Footer.)
Bottom of the same page after checking the "Hide on first page of Section" checkbox. The Textbox could now be locked in position, then de-selected, making the blue selectionboundary disappear.