Garden toad in a bucket, advice please
There's a bucket in my garden that fills up with rainwater. Last weekend I used it to water some plants, but I hadn't looked properly and when I emptied it I saw I'd poured out a toad and toadspawn!
Here's a photo I took at that instant:

I then scooped them back into the bucket and refilled the bucket from the garden hose.
A week later the toad is still alive in the bucket, despite the chlorinated water, though the spawn looks to be dead. Today I dropped in a few live snails I found elsewhere in the garden, as well as a few scoops of soil which contain a lot of woodlice. I also dropped in a bit of a plum, and put a few rocks to the side of the bucket so that it could have a path down. (I'm not sure if the toad can jump out of the bucket or not).
Here's how it looks now. My question really is, what can I do to help this toad now. Should I just leave it be in the bucket, perhaps putting the bucket at an angle to facilitate it getting out (though then it won't catch so much rainfall). I could buy some live crickets online and drop them into the bucket so it has some food. Or I could just pour the bucket out onto a logpile or into the long grass, as I think it might not be able to get out.
Thanks for reading!

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In the sticks near Peterborough
They can absorb gas like oxygen through their skin through cutaneous respiration. It's important that their skin stays wet for this to happen though, which is why they a) produce mucus on their skin and b) can die if their skin dries out. This process works when they are underwater, buried in mud (e.g. hibernating) or out of the water, as long as their skin is damp.
They can breathe air into lungs like we do, but the process is slightly different (called buccal pumping). They change the shape of their mouths in order to create the pressure changes for the air to flow in and out - they don't have a diaphragm or ribcage. Their lungs are pretty undeveloped compared with e.g. mammal lungs though, and the gases diffuse much more slowly into the blood from the lungs than they do into the blood from the skin.
When they're are at rest they will normally only need cutaneous respiration to get enough oxygen, but if they're very active, they will supplement this by inhaling too.
Tadpoles are different though - they have gills, so do need to be underwater, as gills rely on water flowing through them to absorb oxygen.
Common toads don't usually spend much time in the water except for mating as they need to lay the eggs in the water.
Re your toad - it will be happy in or out of the water, but if it has taken a liking to your bucket, you can add a bridge or something so it can get in and out if it wants. The only thing I might recommend is that you add some 'new' rainwater (from another bucket or something) every now and again to make sure the oxygen in the water isn't depleted too much.
Sorry for the essay!
As @Lyn says, they, and frogs, don't live in water.
I live in west central Scotland - not where that photo is...