The fibers in your skin aren't dangerous, just a nuisance. The surgical gloves I believe are fine as long as you aren't letting your hands soak in the resin/bondo.
http://www.405th.com/showthread.php/7550-The-Complete-Respirator-and-Safety-Guide is a good guide, general info on just about all the stuff you'd be using.
If you use your respirator for everything the cartridges will wear out really quick. I only use mine for chemical stuff like resin, Bondo, and paint. Just having a dust mask will do you well for cutting up the fiberglass and sanding stuff. Also! if you want to extend the life of your cartridges keep them in a ziploc (or any plastic bag) and it'll help them from passively filtering out stuff in the air and wearing them out prematurely. But, if ever you start to be able to smell what your working with, through your respirator, you need to replace your cartridges. That's proven to be a small danger to me, as my sense of smell is gone XD I have to occasionally ask someone to come take a puff through the respirator to make sure the filters are still good.