Unless you bought the photo pack recently from The Impossible Project
, then it's not new at all and is long past it's use by date.
Polaroid photo packs have the camera battery built into them, and by now every single one will either be stone cold dead or with only just about enough power to eject the cover slide and power the shutter. Even if the battery did work, you'd find the photo chemicals have also gone stale, producing odd colour casts, uneven contrast and usually the camera eject rollers fail to squeeze the chemicals right across the photo fully into the far corners. If the photo pack has been stored refrigerated the whole time before use then the chemistry may be good but the battery will definitely be as dead as a dodo as cold kills batteries.
You only have two fixes:-
1. Remove the current photo pack in total darkness and store it in a light-proof bag, and then modify the camera to take an externally switched 6V dc power supply (it only really needs 4.5V, but 6V is fine and easier/cheaper to get batteries/transformers for). Then replace your photo pack, it will wastefully self-eject the top photo as if it was a cover slide. As the camera was never designed to be dismantled this often results in a broken camera, but they are ten a penny at thrift shops and charity stores and easily available for free via FreeCycle/Freegle.
2. Remove and discard the current photo pack and replace it with a new one from The Impossible Project
. Note that they are not the same as the original material: there's only 8 shots instead of 10 and the results are less predictable and far more prone to fading, so scan photos after taking them to preserve the images. The material is aimed far more at artistic users who wish to manipulate the images during development.