Well he is after all,
a "god"
Hagoromo already made up his mind, he wants/wanted to stop Kaguya, his mother or not, he wont let Kaguya have her way. Like i said, he is probably up to date about the current situation, he did come out of Madara's lower body that was cut off.
About the Ten Tails, Hagoromo also would have known that Madara was a Jinchuuriki, hence the Tailed Beasts extraction.
Yeah, he knew about Madara being the Juubi Jinchuuriki, he was "trying to get close to his mother's power". Hagoromo isn't literally a god; he is perceived as such, and labelled one. Before he was asking Naruto to stop Madara, now all of a sudden he knows Kaguya, was back (Likely from sensing her presence, but he shouldn't bbe capable through
Dimension, but that barrier is questionable what with
souls coming back lately. But, still, he didn't question at all where the Juubi was, or Kaguya, despite not ever saying the Juubi was apart of her, or that he talked about them separately.
was hago just expecting madara to be cut in half? if that didnt happen how could he come out to help? .............
I don't know, he probably figured that he could appear after Naruto talked to, or defeated Madara.
He is the one who sealed her mother along with his brother... He knew that much pretty well.
I know, but he sealed the Juubi in himself, but they sealed Kaguya separately. That in itself is inconsistent, especially when the Bijuu were seemingly created when Hagoromo was old. He also spoke of Kaguya and the Juubi as completely different entities, despite the fact that the Juubi is apart of Kaguya and he himself stated that the Juubi was a product of the Shinju. BZ also confirmed that Hagoromo didn't know the complete truth, nor about himself.