The back ribbon is a hunting thing, as are the others. Basically only hunt servants and land owners should have ribbons down. Don't think that many people know of it to be honest, although I think it creates a smarter profile as you still have the bow, just no flappy bits. The stuff in your pockets and spare gloves I would think unnecessary for leadrein turnout.
Most of them are small things like if your daughter's hair is in a plait, sew the end under with thread, but they're the sort of things that are done at county level. Your hubby ought to carry a cane and I would take the numnah off as it doesn't fit your saddle perfectly.
It depends how far you want to go with it I think. Things like pulling a tail make a big difference, but you'll have to keep on top of it, and with you also having a small girl to get ready to show, you have to consider whether you have the time for all the little bits, as they can end up taking forever!
He might be better suit being a show hunter pony, plain browband and tweed for "serious" classes, and shove the browband and navy on for the novelty stuff. Just comparing him to the chestnut, it looks a bit finer. Never shown anything but a M&M so can't say for certain I'm afraid.
I found it so shoved it on 
