For banks and/or ATMs you have 1 places with "中国农业银行" for example. About town halls, 1 possibilities exist (like "西昌市政府").
The main cities are the following: 凉山彝族自治州, Xichang.
In term of hospitals you can find 2 location in the region (like "凉山彝族自治州第一人民医院", "凉山州第一医院长安分院").
Are you looking for an apartment for sale/rent? Or interested by a house? You can check that on Anjuke.