Starry, we can all feel your excitement, the lucky ones amongst us have been there and know what it is like to have your very own boat.
Bottle is right, slow down and enjoy your first moments of ownership, there will be plenty of time to get all the stuff you will want later.
To be honest, I would think that your boat would have some bits of running gear onboard, at least a couple of mooring warps and maybe some fenders.
Why not wait till you get onboard to see what is actually there?
The boat yard, perhaps, will let you have an old warp or two if there is none onboard. That goes for the fenders too, although I wouldn't worry too much about then till you gat to Braunston if there are none aboard.
It is all to easy to spend out on stuff and then find out that you actually don't need it.
Congratulations on your purchase and enjoy!
Nipper