Did you see him use them?
Did you see Rikudo using Babutsu Sozo ? Yet we know he uses it . As for your question OP , I think so , yes.
nope, he cant. if you have two rinnegan yes. thats why obito netheir could use all rinnegan powers.
lord madara can cause he have two stocks of eyes.
That's different. The bijuus are proof that he used it.
Until we actually see him use them, it's all speculation.
Madara can use the Paths jutsu because he is shown to use them, the number of eyes is irrelevant.
OT: Maybe.
Did you see him use them?
Obito could use rinne tensei with just one rinnegan and nagato said only those who can use the previous six tecniques can use the rinne tensei.