[Q] [Sony Xperia L] Some questions about unlocking bootloader topic

Hey XDA
I will get a xperia l from my bro tomorrow and want to Root and Flash CM12 lollipop then
But before that i got some questions about the bootloader, because i rooted and flashed just for one time a Samsung Galaxy ace 3.

1. have i to Root the phone before unlocking bootloader or after that? (Wanna use RootGenius)
2. do i need a new recovery like Cwm or can i flash the new Rom zip with the unlocked bootloader?
3. if unlocking dont work: someone got a link for flashing cwm using odin?

Thanks a lot!