I am a bit more fortunate by having quite a few Tree Frogs all around my property. I will share what i know and has been successful for me.
I don't have any ponds yet have over 20 on my front deck and around my back door. Mine live in the down pipes and in the water tanks. I am sure i wouldnt have as many in the front if i didnt provide ceramic water dishes for the dry periods.(we have had only 2mm of rain in 6 weeks now). The frogs get used to whats there. At first i would pick up some of the really brown frogs(the dehydrated ones) and sit them in the water dish. Now they go in there by themselves and live in the large pots near the dishes.
Northey Street City Farm have a couple of frog ponds there that discourage Cane toads setting up shop and dead easy to build and cheap. As has been said toads can only jump a certain height, whereas tree frogs can climb and jump higher. We have an old bath tub under a Loquat tree out the bag but no frogs as there are a few small fish in there that eat the eggs.... there are frog egg friendly fish that you can find though.
The deal with the water is to keep the temperature under 26C or better in some shade as toads need the water to be the right termperature to breed and frogs like a sheltered relatively cool situation as they sleep mostly during the day.
I just love to think what the cute little critters are doing to the bug population in my garden.... i call em my night crew that clock in when the good bugs go to sleep and the bad bugs come out to play.
Hope this helps a bit....
Township of Boonah (pop 3,000)
2.7 acres of gently sloping volcanic soil
"Progress is a spiral; the pendulum swings back as well as forward. The new postindustrial world, for which many of us are striving, will see an ecological renaissance".... Rober Hart