Koalas are only native to mainland Australia. We have plenty of possums though.
The main rose in that pic is a David Austin cultivar called 'Grace' if I remember right. It was given to me and my daughter to celebrate her birth 7 years ago. Really needs a good spot in the garden as it has gotten terribly hungry in that pot. The dark red one is a seedling of 'Climbing Sympathy' from my own childhood garden. I like roses with personal meaning. Thank you.