Here is a toad care sheet for you...
http://www.frogforum.net/content/toa...pelobates-125/

The substrate should be moist, wet, but not soppy or muddy. A couple of inches is fine for depth.

Cover the back and two sides of the tank to decrease his stress. You can add a nice smooth-edged large leafed plant for shade. They love to his and peek their heads out.