I was watching the new anime episode, and tobirama knew about orochimaru attacking the village, because he was like "are you going ot attack the village again?" but he knew who orochimaru was in general. But when tobirama apointed hiruzen to be hokage, and died shortly after, hiruzen was like pretty young, i'd say in his 20's, And when hiruzen made his team of genin, he was much older and orochimaru was just a kid.
How the hell does tobirama know about orochimaru?
How the hell does tobirama know about orochimaru?