[![pay no attention to ground wire. This pic is before it was redone](https://i.stack.imgur.com/rfn64.jpg)](https://i.stack.imgur.com/rfn64.jpg)

My utility requires a bare #6 wire to run from the the rods to the meter pan and be bonded with neutral. The wire then runs to the ground bar in the panel.  

I have an old panel with only one bar for grounds and neutrals.

My question is, since there is a ground neutral bond in the meter pan, do I have to separate the grounds and neutrals in the main load center?

My other question is, can the conduit that connects the main load center to the meter can be metal with a bare ground wire running through it or does it have to be PVC?

Ps. The ground wire in the pic is done wrong but this pic was taken before it was redone.