Hi! I'm also an owner of HTC desire 516. I'm searching for root solutions since a month, but all in vain. There are no root solutions till now.
For the drivers part, you can get the drivers in ur phone itself when you connect it to ur pc via usb. A separate removable drive is created from where u get drivers.
For the rooting part and to encourage further developement u need to start a section on Xda. For that you need to make a request by posting here.
*** New Device Forum Requests ***
I've already put up a request. I encourage u to do the same.