Does rooting a SONY Xperia Z2 remove SONY specific features?

Dear Android Enthusiasts, I'd like to root my new SONY Xperia Z2, but feeling a bit unsure about that I may loose SONY specific features. I'm new to Android (switched from iOS) and don't know how deep the SONY Android UI/Skin is integrated in the system. So I'm talking about noice-cancelling headphones, camera app, Xperia Lounge, ... Am I able to install and use these apps after routing? In addition I got some other questions dedicated to this topic: - As if rooting does not fulfill my expectations, can I reliably restore a backup somehow without loosing any data/settings/...? - Am I right that rooting a device removes its guarantee? (And is there a way around?) - Is there a good website containing instructions about rooting and downloading sources? (deliberately objective question) - Am I able to install a pure/vanilla/stock android os on my device? I know that I may find answers to my questions somewhere in the internet (I did search A LOT), but I experienced it's very hard to find reliable answers about the specific device "SONY Xperia Z2".