The difference between the oats is that quick oats is cut up finer which makes it faster digestible. The problem with that is that you want slower digestable carbs so the insulin release is slower. IOW, stick with the old fashioned
Depends on the amount of olive oil. If you are pouring it on then you should count it, if you are just lightly brushing your food then the amount is negligible.
I typically suggest 2-3G of sodium a day. Remember this is sodium in your food already so monitor that too.