Hi Silburn
For this trip we would recommend that you take appropriate walking clothes are required such as comfortable trousers and long sleeve t-shirts, it is a good idea to carry a raincoat and also a hat and sun lotion as well as a jumper for when the temperature is cooler. You'd also want to make such you take a backpack so that you are able to carry your belongings such as water, jacket, camera etc on days out and then as you mention appropriate walking shoes.... For a happy trek you need comfortable feet. Walking boots are perfect. These must be lightly worn in before trekking and this should include some steep hills to show up trouble spots before the trek.
Kindest regards,
Julia