If it was mine (I've only been doing this seriously for a few years), I'd take all the leaves off (I'd usually leave a handful if they look healthy, but none of those in your pics do). Until your roots re-establish, leaves aren't doing anything but drawing moisture/energy from the tree. Looks like you have fairly thick, healthy branches; I wouldn't do anything while that is the case, but watch for any signs of shriveling/wrinkling or discoloration in any branch. If you see that, take that branch off or down to where it looks healthy.
You'll probably start seeing small green nubs of growth at old leaf nodes as the tree tries to put out new branches/leaves, likely many more than would be ideal. I would spend a little time analyzing the existing branches and decide where the best points for new branches to grow from would be, then I would remove (scratching with your fingernail does the trick) all the little nubs besides those where you want branches. Limiting the number reduces the energy drain on the tree (it doesn't have leaves, so it has only its finite, stored energy to draw from) and increases the amount of energy going to the chosen nubs.
Good Luck!