Pages is a word processing application that supports only two layers: 1) front, and 2) back. If you require six layers, then you should be looking at a different tool than what Apple provides to create each individual label as vector artwork.
Once you have the artwork done in the first paragraph, you will also note that Pages does not provide any label templates either. For that, you should consider the Avery site and one of the available (5392) 3 x 4 downloadable templates. Then its a choice of continuing to use your third-party vector tool and use one of the blank templates available (.e.g. .psd, .ai, .pdf), or wresting with Pages and copy/pasting your individual vector artwork labels into that solution. Avery even has an online label production facility that may prove more functional that Pages.