Here's my contribution, from Santiago. More specifically, these numbers refer to the comunas of Santiago and Providencia - not the most expensive part of town but upper middle class areas where most expats and tourists tend to be.
- Accommodation: From $150.000-$200.000/month for a 1-bedroom unfurnished apartment depending on size, location, view. Could be double that for a furnished apartment.
- Public transportation: $380 for the bus ("micro") all day or metro during non-peak hours, $420 for metro during morning and evening rush hours. 90 minutes to combine bus-bus or bus-metro journeys without being charged again.
- Food prices: Hugely dependent on where you shop and go out to eat. Shopping in main supermarkets can be up to 50% more expensive than "ferias" (open-air markets) for things like produce, and the best deals are always at La Vega, the main market located in the Recoleta neighborhood. We tend to shop at La Vega and spend around $100.000/month for 2 people. Eating out can run from under $1.000 for a quick snack to limitless bills in fancy restaurants, but a standard dinner (sit-down, cloth napkins, but not too fancy) runs around $25.000 for two entrees and alcoholic drinks.
- Health: If you work, your employer must pay 7% of your salary to an Isapre of your choice. If you want to improve coverage, you can pay the extra out of pocket. A super basic plan runs around $15.000/month, for $40.000 you can have a pretty comprehensive plan - at least on paper. Isapres are known to be shady, and since healthcare in Chile is relatively inexpensive at least compared to US prices, you may be better off with the cheapest insurance plan and paying out of pocket.
- Energy: Our total gas, electricity and water bills tend to come to around $25.000/month for a 1-bedroom apartment with 2 people. We use energy efficient lightbulbs and generally try not to waste resources, and we don't use our heating.
- Internet and cable: EXPENSIVE! These are luxuries in Chile, with a full cable/basic internet plan coming to $37.000/month.
- Mobile phone: Many people have pre-pay plans, and you can buy top ups for $3.500 or $5.000 around Santiago. How much your phone costs depends hugely on which plan you have (some offer good in-company rates but charge lots for other calls, others offer flat-rate), but in general people don't use cell phones to chat as they do in the US.
- Beer and coffee: A good beer should run you around $1.200 for a liter. Coffee is usually Nescafe for around $600.
- Movie ticket: $2.700-$3.900 depending on the day and time.
Hope this helps!