No, Rodimus Prime, originally named Hot Rod, is the Autobot Leader who succeeded Ultra Magnus. Ultra Magnus was handed the Matrix of Autobot Leadership after Optimus Prime died. Following this, Ultra Magnus was killed by Galvatron, who took the Matrix. Later, Hot Rod later fought Galvatron and took the Autobot Matrix of Leadership and was chosen by the Matrix to be the next Prime, and thus, became Rodimus Prime.

Yes the autobot bumble bee is an autobot scout.

Autobot

The oldest autobot in the film(s) is ironhide.

well starscream use to be a autobot but he betrayed the autobots so he could learn how to control dark energon from megatron so he was an orignal autobot so he should be a an autobot