Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement.
No serious private advertisers ask for a down payment before you meet.
Receiving an email with an in-scanned ID does not mean that you have identified the sender. You do this on the spot, when you sign a purchase agreement.
Clothes for a boy, size 110-116: 3 shirts, 2 hoodies with a hood, one fleece jacket, 2 pairs of jeans, a cardigan, a jumper, shorts, a T-shirt, a summer jacket, a Reima jacket with a detachable lining.