Yes Sakura learns how to summon Katsuyu-sama, whether or not this takes place during Naruto Shippuden is unclear seeing as how Tsunade is in a comma.
She has called Tsunade: Tsunade-sama (Lady Tsunade), Hokage-sama, Godaime Hokage-sama (5th Hokage), and Shishou. (master)
no one have larger boobs then tsunade but as a competitor to tsunade their is a women in one peice or in bleach which is same as tsunade but tsunade boobs rock !
sarutobi is tsunade's instructor
Tsunade doesn't bounce.
When Jiraiya and Tsunade were Genins, Jiraiya fell in love with Tsunade.
No, Tobi does not kill Tsunade.
Most likely because Sakura was Tsunade's student. Also because Sakura has the same brute strength as Tsunade does.
Tsunade's summon is a slug called Katsuyu
Tsunade's boyfriend's name was Dan, but he is not in the series because he died like Nawaki, Tsunade's younger brother.
She took Tsunade's training to get stronger
the second hokage was Tsunade's granduncle