Head Gasket- what am I looking at?

This is my first head gasket job. This looks horrible- not really like the pictures you see with a breach between cylinder 1 and 2. This has been on for 100k miles.
Symptoms:
Used about 10 oz of coolant a week for about the last 2-3 weeks.
Just last week I started getting P300, 301, 302, and I think 304, but not until then. Of course I've had some hard starts- but minor. No over heating (I have a scanner app I use every time)
What is this? Normally I thought you would see a "steam-cleaned" piston and cylinder- they all look like this. (The green in coolant was that dye I used hoping to find a leak and not have to to this)