I'm playing realm of arkania 1 On my way over the mountains I ran into several large groups of brigands and my two magicians didn't make it. Is there anyway to bring them back to life? I can't find anything about it in the manual. Thanks!

You can pray at a temple until they are resurrected. Tsa and Ingerimm did this in my game, but any deity is supposed to be able to resurrect dead party members.
Success chances depend on how much the deity likes you.

You are most likely to be resurrected at a TSA temple, as it is the deity of life.

But beware, two times you can lose a party member for good! He/she will be gone forever:

It can happen during mountaineering between Orvil and Rovik, or

***** Spoiler Warning****

If you fail the riddle of the Griffin, one member will be gone forever ...

***** Spoiler Ends ****

For resurrection in the temples, spent -a lot- of money, 100 gold coins for starters, to improve your chances...