Can you do this the Thunderbolt port?

Hello community,

I have a MacBook Pro Early 2011 with a port Mini Display Port. I want to buy a Dell monitor for my design work.

I have in mind two DELL screens of 27" UZ2715H and another 24" U2414H.

The UZ2715H has a Mini Display Port input would have no problem connecting it to my computer, but the 27" which is what I'd like nose if would be fine, as the Display Port that includes having a version 1.2a. Do not know what version is the Display Port of my computer does not know how it will behave, I searched all over the web and still not get to know.

The second question is, if I connect these using Display Port or Mini Display Port, can I take the USB 3.0 that incorporate screens to manage their capacity through the computer? how a sort of hub dock.

And the last is, can I use the camera and microphone are built into the UZ2715H ?, by thunderbolt connection?

Thank you very much in advance