First of all ........... can't go wrong with stainless steel bowls. He may not have any problem with plastic but stainless steel is so easy to keep clean.
I would DEFINITELY get him a separate crate ........ he has to have his "cave" or "safe place" that only belongs to him.
Fromm do a puppy food ..... that's what Linus was on for a while when we got him but I quickly switched him on to the Fromm 4* range for convenience because that's what Maggie and Daddy were on. The Fromm 4* range is an all-stages food so they can have it from puppy to senior. I wouldn't worry too much about getting grain-free. He won't have too many allergies right now so unless he shows signs as he gets older of not doing too well on grain there is no need to limit his diet just yet.
I would feed Aldo and Katara before him.
Introduce him to your two poodles the way you plan on introducing him to the two bullies. Be consistent in your approach and remember you are the boss of two poodles too so don't accept any bad behaviour!!
Linus did great with puppy pad training until he'd been here for a week when apparently he didn't want to use them anymore and just peed anywhere he felt like it. So try the puppy pads cos sometimes they work and sometimes they don't!!!
He needs to have ALL his inital shots before you start to take him out into the neighborhood where there have been other dogs.