What country are you in?
If in the US, with the camera angles I have, I would want to call it Rana pretiosa (Oregon spotted frog). If that is the case, put the frog back where you found it, they are in danger of extinction. In fact, report where you found the frog to your local fish and wildlife service.
If you are somewhere in europe... knowing what frog it is may require knowing what country so I can narrow it down.
As far as the habitat, a lid would be nice. You may want to grab a ceramic flower pot and break it in half (down the side) so the frog has places to hide. Oh and duck weed. Lots and lots of duck weed. A few extra land areas would be good too.