Holy Critters!

The other morning when I was outside walking around the house to see "what's new", I heard something rustle near the window well.  Very carefully, I approached because I did not want to be surprised.  I peered over the recessed hole and saw the most adorable thing!  In among the weeds that had grown inside I counted at least 12 toads, ranging in size from 1 inch to at least 2 inches!

So, now a few thoughts:
How do they get out of there?
What are they doing in there to begin with?
Do I need to save them?
  Are any of you "frog friendly" or "toad troopers"?  If so, I could use a bit of advice here, so just "jump" right in with the answers!