Pagefile is pretty much always (when automatically handled by windows) the same exact as your usable RAM, I've never quite understood why it does that, but yes you still
want a page file of some sort. Windows can get somewhat... cranky when pagefile is completely disabled (to the point programs won't even work/run right), but with 8GB of memory you can probably reduce the pagefile some or move it to a secondary drive if you have one. Alternatively if you've got USB3 at all, get a cheap-ish few-GB USB3 thumbdrive and set it up for the pagefile (USB3 rocks a good 5Gbit at theoretical max, which is slightly lower than SATA3's maximum but higher than SATAII's maximum, so it makes them a good pagefile/ramdrive handler if you support USB3).
As for hiberfil, you are correct, it's a file reserved as long as hibernation is 'enabled' at all, even if it never triggers, and it'll allocate around 75% of your total system RAM in reserve for that file. You can safely delete this file as long as hibernation is disabled, which you can read how to do
here (they also give you a quick little 'fix' file you can download that will do it all automatically).