Hello there,welcome to the great fandom of Paramore!
If you want,I have the complete collection of b-sides and demos,just send me a private message and we'll work it out.
Well,I think it's important to know that Paramore are not like other bands. They're very down-to-earth people,very friendly (they post a hell lot of funny videos),very sociable and they love keeping in touch with their fans! I think these are some key characteristics of theirs. If you're curious,you could look their biographies up,see how they got started etc. The saddest moment in the Paramore history was the departure of the Farro brothers; their wiki page says pretty much everything that happened.
In the end,you'll find by yourself what you consider most important about Paramore. For instance,the most important thing they do is never letting the fans down,no matter the situation.