Congratulations on getting a cockapoo! I have one, and have met loads over the 4 years we've had him. (see my profile). Can't ask for a nicer-natured breed.
He was a monkey as a puppy though, although I expect most puppies are. He was an absolute pest at night (whining and snuffling and harrumphing weeks after everyone told us he'd stop) and would chew through most leads. We had to get one with metal links on the bit nearest to him in the end.
Re: treats, even now we find it's better to have small ones when out on walks. He can down them in one, without having to take time out to chew. He'll do anything for those bacon twirl things - probably full of nasty additives, but we save them for higher-stakes recall, e.g. when he's mucking about outside and we need him back indoors quick. He will ignore the fridge door opening, until the nano-second you place your hand on the cheese, whereupon he will hurtle down to the kitchen from wherever he is, on the off-chance there's a bit about to be dropped on the floor. The teeth-cleaning sticks are useful. I've given up getting him bones (shop-bought, not cooked, as they can split and choke on them) as he just takes them straight out to the garden to bury. If I don't let him out, he hides them in the ironing basket or behind plant pots. Found one in ds's bed not long ago!
Don't get toys with squeaks in. Not only will the noise drive you insane, but they can choke on the workings, once they've worked it free. Trouble is, the vast majority of those on sale in, say, PetsAtHome have them in. Mine loves playing tug-of-war with one of those twisted rope things. He has also always had a teddy on the go - keep a watch for any eyes coming loose though, and make sure he doesn't actually eat the stuffing, as opposed to just depositing it all round the house. He sleeps with them and carries them everywhere until they fall apart.
What colour is yours, and what are you going to call him/her?