Where do I start?
A rucksack and walking boots are the two most important things.
Your rucksack needs to be comfortable. It needs to provide ventilation to your back and spread the weight across your shoulders.
As for your boots, it’s important they are lightweight but also waterproof (Gore-Tex) when it comes to negotiating streams and snow. But most of all, the sole needs a good grip and the capacity to absorb impact.