Because he wanted to capture all the jinchiuri and somehow to make peace in the world
Nagato
Nagato and his friends made the Akatsuki first it was just them then other people joined and so now
no, it is madara uchiha.
Konan and Nagato
The Akatsuki Leader is Pain/Nagato
Nagato controls the pains, he is also the founder of the akatsuki.
By the end of the "Naruto" series, there are only two known Akatsuki survivors: Nagato (Pain) and Konan. After the events of the Fourth Great Ninja War, Konan is killed, leaving Nagato as the last remaining member associated with the original Akatsuki. However, if considering the broader context of the Akatsuki's legacy, some former members like Itachi Uchiha and Orochimaru have their own paths that diverge from the organization, but they are not considered survivors in the same sense.
Konan joined the akatsuki for Nagato his brother. Konan was always extremely loyal to him so if you call being loyal to your brother love... then ok! Konan just respects Pain's plans and therefore joined the akatsuki
Nagato controls the pains, he is also the founder of the akatsuki.
If you mean the strongest, probably Nagato or Tobi.
I'm pretty sure it's Nagato
Yes but Kabuto said that he's brought back five Akatsuki members alive and Nagato is one of them.