I posted this topic a few years back. Perhaps this will be of use?
The drained oil had some super-fine particulate in suspension, but as far as I could deduce, it wasn't ferrous - a very strong magnet didn't attract it at all after several weeks.
I have kept some of the old transmission oil - if someone wants to offer a free oil analysis of it, that would be fascinating!
The genuine Toyota WS-ATF is around £11 a litre from a Toyota dealer on eBay, probably similar from a dealer. It isn't much more expensive than generic ATF, so there is not much point not using the genuine fluid. The oil isn't hybrid-unique, it goes in most modern Toyota auto boxes. There are 2 identical aluminium drain plug washers, which are about £3 each.
I think the photo makes the oil look a little more in need of a change than it was in the flesh.
I have done another Auris hybrid (first change) at about 55,000 miles, it looked similar.
Those hex/Allen bolts are very stiff to loosen initially! I would think about get a tool that goes onto a regular socket set, to save bloodied knuckles when it 'cracks' loose.