Hey there I read your post and I have some advice for you. Of course some people may disagree with what a say, but everyone does things differently.
I have 12 toads in a 50 gallon tank and I give them about 75 crickets once a week. I love watching them eat...they are maniacs!!
Toads are not like goldfish (who are apparantely so stupid that they will eat themselves to death). I notice when my toads are full. They will even let a cricket walk all over them and in front of them and they won't touch it.
When I got my first three toads the people at the pet store told me that they would eat 5 crickets a day EACH!!!! What a waste of crickets that was! But you know what, some of my guys will eat 10 of those crickets that I put in, and some others will only eat a few (remember, this is once a week feeding). I have found that they each have thier own personalities, some are more active, some more layed back. They have their own eating habits as well.
My advice to you is to just watch your toads. Get a feel for each one. If he wants to eat 4 crickets a day, then so be it.
Oh, and about the toads 'fighting'...I wouldn't worry about it either. My toads don't do that anymore, but they used to. Now they just try to hump eachother all the time!!!
Good luck with your babies!!!
Tanzee