There are 3 different types of boot to choose from:
Light to midweight boots are ideal for scouting as they offer ankle support and protection from rough terrain. They are great for activities like completing expedition challenge and they are almost essential wear at camp when the weather gets wet.
Boots should be worn in gradually before they are worn for a long period of time. Thick hiking socks are a must.
It is often possible to purchase a decent pair of second hand boots for not much cost and as a bonus they'll already be worn in.
Choose a sleeping bag which fits the activities that you like doing for example if you do not intend to take on an expedition then there is no need to buy a bag which is super light.
Try the bag on in the shop - this may seem a bit odd, but it means you can see if you like the inside material against your skin and whether you like the shape.
Choose a jacket that fits properly. You don't want a jacket that restricts your movement - it's not great for putting a tent up in the rain! Equally a waterproof which is too baggy can get caught on things which isn't great if you're riding a bike.
Ideally the jacket should have a high zip and a storm flap to keep the elements out.
Make sure that the seems are sealed - this is a requirement for the jacket to be classed as a waterproof. Look for a hood which can be done up so as to protect in the cold.
Look for draw cords on the jacket to give increased flexibility for what can be worn underneath or to allow greater movement during an activity.