the missing toe isn't anything to worry about as long as it is healed and not just dry-rotting away. It isn't that uncommon for them to lose a toe in a screen or something.
As for the things to look for for healh and such I have a pretty thorough caresheet that you should look over. If you still have questions post them and one of us will help out. Of course you can post anytime you like
This forum has been very slow and really needs some posts!
Here is the link to my short caresheet:
http://www.froggieb.com/MHDshortcare.html
Here's the link to my in depth sheet:
http://www.froggieb.com/MHDCaresheet.html
Good luck with your new dragon and Welcome to the forum!
Marcia 