The weather in Oxford varies by season. From Aprl - September it is usually mild, with occasional hot & sunny days in summer. The winter is quite chilly but the temperature rarely drops below zero. It can rain any time time of year so be prepared.
Toiletries and Medical Supplies: No need
Photo Equipment: Be sure to bring a camera - there is lots to photograph.
Clothing/Shoes/Weather Gear: Well, I live in the United Kingdom part of the year so ill give you the best packing info I know. Bring a brollie(umbrella) and a slicker(raincoat) and some waterproof shoes. It rains on a whim in this part of England...be prepared and its none too warm either, even in summer for this Florida boy.