Lainiekazan can you contact an APDT member. You do need educating on current training methods and everything will begin to fall into place.
No you are not rewarding for biting if your give a treat to get the dog to give your something.
However it does sound from your threads that you need to work on basic behaviour. EG I would be working on clam sits before I took the item then the dog could not be jumping up and down and biting as you swapped things it is holding.
There is a lot of foundation work that can be done that does not seem like training but will make official training easier.
The first thing to do is teach the dog how to take treats as mentioned in my previous post
He the next thing is to work on a reinforcement zone eg when the dog is near you reward, then the dog works out that pleasurable things happen around you, this means recall is easier and removing items from the dog is easier. (But work hard to make sure he does not get the items in the first place is much better)
Re biting, all interaction stops, no shouting, no yelling, nothing just walk away. Nothing happens at all when he is biting. If everyone is consistent he will get this in a few days.
Get a clicker and just say his name and then click and treat when he looks at you - do this several times a day and your dog will not be staring out of the window at training!
Get a tuugy toy and teach him how to give up toys, play tuggy then release the dog and the game ends, ask him to give hold smelly yummy treat on the end of his nose, give him this when he drops the tuggy immediately run away and let him chase you for the tuggy. This is teaching recall and give in a fun way. Your dog will luuuuurve you for it!