Well, yes, I do believe they were historically real, but I'm not sure any of your options fit. I believe it's a lot more complicated than any of that. I do believe Neanderthals (and various other stages of human development) occurred, but I'm not sure at what point in that development people were "us" enough to be Adam and Eve. Although Adam was the "first man," I'm certainly not convinced he was the first human-esque creature to ever walk the earth.

As for where they lived, we talk about the "Caucasus" area (in the Middle East) as being the "cradle" where humans first lived. But that does not mean that's where the Garden of Eden was. Revelation has indicated that it was in the Midwest. And although Adam and Eve were initially constrained to the Garden, that doesn't mean they were the only creatures on the earth at the time of their creation. And it doesn't mean they stayed in that area when they were cast out. Plus, back in Pangaea times, those areas were a LOT closer together than they are now.

If they were in the Caucasus region, it's possible they were "white," but that could be "white" in the sense of looking like Middle Easterners, not necessarily as white as me or the people in the temple depictions. But they may also have been more African looking. I don't have a strong opinion on this.

Basically, I think a lot of it boils down to "we don't know for sure" and "we'll never sort it all out," but I do believe they existed. Overall, I think it's more complicated than most people who believe may acknowledge or realize.