hello leajo! he is too young for treats. however, you can use other stuff which works just as well for bonding, and that's chews! little balls, small apple/pear sticks, bark pieces - hand these to him, he will most definitely take them from you! the hanging wood chew... is it one made out of wooden blocks sort of thing? i find that most of mine are totally unexcited by blocks of wood, they prefer smaller things they can hold and are not as solid. chewing on everything else including your clothes is normal i'm afraid but you have to be careful not to let him eat stuff that can harm him (because he will try!)
as for picking up... i think perhaps you're going too fast. you've only had him for a week and a half and from my experience, most chins don't like being picked up even if they like being tickled under the chin or stroked. i've got six chins and only one likes being picked up and he doesn't actually like to be held! he asks to be picked up and then he protests when you hold him
squeaky noise means he's letting other chins know (i know there are none but... ) of danger. given that you are the danger he's warning others about, i would back off and stopped picking him up unless absolutely necessary (ie vet visits). give him time. scratch under his chin, around his face and ears. he may decide later that picking up is not so bad but it may not happen.