Man, Alvin is great at hooking people up with some fine Weber scores!
I'll keep working on the grate, any pointers?
Do you have a weed burner? These work great.
I like to grab a scouring pad, and some cheap vegetable / cooking oil.
Before using any oil, scrub the grate while it's dry with a dry scouring pad to help loosen and remove unwanted stuff.
Then dip the scouring pad in some oil and scrub the grate - top and underside. Then hit it with the weed burner.
Assess the grate, then repeat above procedure with the pad and oil, if necessary.
Based on the pics, that grate should clean up nice. Don't expect it to look like new, unless that's your goal.
When you feel it's to your satisfaction, put a light coating of veg oil on it, and it should be good to go.