Training my Maltipoo

Question
We have 2 maltipoos: Napoleon and Durango. Napoleon is 3 and he uses a bell to tell us he needs to go out. We love the method we taught him and we are really trying to get Durango (4 months) to do it too. Durango is my first dog that I get to train so I really have no Idea what to do because I watch him non stop and he is kind getting the point of ringing the bell but when I let him out he doesn't go unless I walk down the stairs with him. I don't mind doing that now, but later on I want him to know that he needs to go down on his own. Along with the occasional potties outside he does go inside quite often. I have a feeling that if I don't get him trained soon my parents may go bazerk! Along with peeing he love chewing on fingers and though it doesn't hurt that bad later on it will and I cant seem to get him to learn that he can only chew on his toys... not fingers, Napoleons tail or his ears, or our toes. PLEASE HELP ME!!! HE NEEDS TO BE TRAINED SOON!! oh and he barks excessively

Answer
Continue to go outside with him for a while. He'll get used to doing it himself. I would also take him out on a schedule instead of waiting for him to ring the bell (you can give him a chance to ring it before you go out, but you choose the time) At four months, the absolute longest you can expect him to be able to hold it is 5 hours. And not every dog of that age can do that. When you go out with him make sure that he potties within 5 minutes or put him up for about 5 minutes and try again. Use management like a crate when you can't supervise him. Use baby gates to keep him in view. You might even tether him to you in the house. If he starts to sniff, get him outside. Feed him on a schedule (at four months, I'd be doing 3 meals a day) If you allow him to eat anytime he wants (free feed) it's harder to figure out when he needs to go. Keep a potty journal so you can see his patterns. Clean any soiled areas with an enzymatic cleaner.
All puppies chew on fingers. You can try saying "ouch" and if he startles give him a toy instead of hands. Avoid lots of quick movements around his face (trying to grab his muzzle, etc.) as that actually stimulates biting. If he is really persistant, use an interrupter word, get up and leave anytime you feel hard teeth. He's wanting to play, and if play ends when he bites, he'll try something else. Be sure you are giving him options and letting him know that those other choices will be rewarded.
Here's a good article on barking - be sure to click on the link in it to teaching bark/quiet. http://www.clickertraining.com/node/1125
Sandy Case MEd CPDT www.positivelycanine.com