Take several pairs of thermal garments to wear under your skirts, of course you will need warm tights to cover the garments. It gets very cold in the winter and hot in the summer. You may want to have separate wardrobes shipped out when the seasons change. Get things that can be machine washed. You probably won't have money to dry clean very often.
Jumpers are great-very comfortable and work well with layers over the top.
These suggestions should keep you physically comfortable whether you are in a car area or a bus area. I am simply a Sister in the CTWM with a suggestion for missionaries coming here. I am not sure if it works the same in all wards, but in our ward the members take turns feeding the missionaries. I just want to suggest that when you arrive in a new ward that you tell the families who are preparing your meals you have any allergies, or particular food dislikes. This could have been avoided if he had only said something earlier.