These are the principal cities: Городское Поселение Мосальск, Мосальск, Савино.
For banks and/or ATMs you have 1 places with "Сбербанк" for example.
In term of gas stations you can find 1 places (like "АЗС Нефтеком").
About tourism places, 2 possibilities exist (like "Ленин", "Мосальский краеведческий музей").
Are you looking for an apartment for sale/rent? Or interested by a house? You can check that on Циан.