Installation W.S2012 on Proliant DL180 G6

[mssfrance]

Hello Everyone,

I'm trying to install and configure an old Proliant 180G6 that my IT department gave to me, there are 8 new hard drives and no OS installed. I need to configure RAID + Windows Server 2012.
There are 8 x 2TB drives.

I'm more it an IT networking guy, so I'm asking a little help here :

The drives need to be in GPT ? or Legacy BIOS? how to choose this ?
What would be the best RAID if I want to have 1 drive faillure and a lot of storage ? How and when to configure the RAID ? prior installation of Windows ?

Thank you all