There will be an induction day for the boys near the end of the summer term.
Don't worry about the initial info pack - it will get to you in plenty of time.
There will also be a meeting for parents before the end of the school year.
There is also a social evening for parents and year 7s in September.
The first week of school the boys get well looked after to make sure they are settled in.
There are some items of uniform that are school specific but many can be bought from supermarkets.
The PTA also run a good second hand shop which will be open at the new parents evening and St other times ( in your induction pack and on school web site).
Some items eg track suit and jumper you can hold off buying until you are sure he wants them.
You will also get info on the mouthguarf service available on the induction day. You can just get a boil diy one but people have mixed results. As long as he isn't in the middle of orthodontic treatment the made to measure are worth considering.
Its worth thinking about whether he will want individual music lessons in school but apart from that there aren't many decisions to be made so sit back and enjoy the moment