I’m assuming that you mean front and back of a page as opposed to the right and left pages of something like a pamphlet where the laft and right are printed on one pieceof paper and then folded to produce 2 pages.
You do not say whether you’re using a duplex printer that prints froant and back of each page or whether you’re using a printer that requires reinsertion of the pages after printing one side. If you’re using a duplex printer, the 2 side printing is handled by the printer driver and not ID. On my version, CS1, that is accessed in the main print window by clicking on the Printer button and choosing to print both sides in the successive windows.
If you’re talking about first printing one side of the pages and then reinserting in the printer to print the other side, that is handled under Sequence in the General section of the ID print dialogue.
If the color is not coming out correctly on the pdf, you’re settings are off. If your printer works in RGB and your indesign doc uses CMYK colors, the colors won’t match. Make sure that you use the color mode that matches the printer. Make sure you use the Press pdf export in Indesign and go to the Advanced tab. Under color select either leave unchanged (usually easiest if you’ve used the proper color mode) or possibly rgb for your printer. Unless you have a postscript printer, it will be rgb.
Using OSX 10.3.9 on a G4