Looks nice and complete, so that's a good start.
If it hasn't been ridden in a while, start with the carbs. They will be gunked up. I recommend a complete strip and soak in a cleaner solution (I bought the Gunk 1 gallon size soaker, it includes a tray to hold parts).
You don't have to go crazy replacing stuff. My bike had sat for 30 years before I bought it. Engine wise I just replaced the carb gaskets, installed new plugs, cleaned the tank and installed a new petcock (mine was frozen solid), and changed the oil and filter before the 1st start and again after aboout 10 miles of riding once I got it back on the road.
I also cleaned and gapped the plugs, checked the static timing, and cleaned every electrical terminal on the main fuse block and coils and wire brushed the frame where the battery ground attaches. Bad connections cause a lot of the problems that people think are carb related when getting non-runners going again.
