For races: core and featured, with uncommon being up for debate depending on backstory and what abilities are taken. 

For classes: Core, Base, Hybrid, Occult and Alternate (With the exception of Antipaladin, which will be possible to get later but not at the start). Additionally any third party classes are up for debate. If there's an interest of any classes of a set not mentioned above, I'd need to be linked to it so I could look it over and see what it can do.

If you're new though, 3rd party classes are probably best not venturing off into.