You will just need new coloured bulbs in your indicators, often the orange paint on them cracks and comes off with age so the light becomes more white. There is no requirement for the lenses on the indicators themselves to be orange, just to emit an orange light.
I think they guy was just being officious - with the battery for example I don't think it matters if it is loose, the test is about is it secure - so if it can move a few millimeters but there is no risk of it falling out or touching other parts if the vehicle rolled over - should pass I think. Also would query the use of deterioration - I would have expected to see the words "wear" or "play" on an advisory.
But never the less, your car has ""slightly" passed and that is still a pass!