You don't have to travel far to get supplies, Joshua's harvest store is a 3minute drive/20 min walk away where you can buy all sorts of local produce and homemade treats. They also have a tasty cafe that's worth trying. In Ottery itself there are a number of shops including a green grocers, butchers, bakery, pet supplies, florists and a Sainsburys/Argos.
Other stuff
Exeter which is just 30 minutes away has a great selection of high street shops. There is also Darts Farm shopping village just 5 mins off the M5 on the outskirts of Topsham. They sell artisan produce, gifts, flowers and furnishings - not your run of the mill stuff !