Have to agree with Whirlybird - just buy the kit!
FFF makes a good point about the chart, tho. The SE England chart is replaced about mid-March, you can check the others on the CAA website.
You can never have enough bags - I have a case (bought in a sale) for all my flying thing, and was given another bag that I use for passenger's kit (2nd headset, "lunchbags" and hi-viz) that gets left in the car if I'm flying alone or with another pilot.
16" ruler is very useful for flight planning on the ground, but get a shorter one (8"?) for flying, it's less prone to get in the way!
Enjoy your flying!
SD