He actually bought a lot of his new clothes at used clothing stores. He has a trusted hoodie (for a university he’s never even been to) and a baseball cap. He has a few ratty old t-shirts, a couple tank tops, two pairs of currently nice jeans and more than a few not nice jeans, a pair of mismatched fingerless gloves, a vest and tie and white shirt he has not worn since he used them to get the job (because he figures it might be too much of a hint), a sweatshirt, two pairs of sweatpants and an even rattier old t-shirt (for sleepwear), and his uniform. He also has a pair of sunglasses, though they’re not stylish—he purposefully bought the most dorky pair he could find.
He started to grow out the beard, since he was previously clean-shaven, but was required to shave it for the job. So now he mostly relies on a complete change in personality plus the unexpected plus the Miraculous glamour.
He managed to tug You and Dummy to safety but had to put them in a storage facility Howard used to use. It’s not listed on the properties he or Stark Industries owns. He would’ve taken them, but it would’ve been too obvious.