You will find, however, that most people run the pump about 6 hours a day and the actual consumed energy is only about $30/mo. You can pay more for electricity - some providers are quite high. I didn't use my provider's rate (Champion), but it's only about 9 cents/kW-hr.
Remember to add the cost of the pool light, if you have one. A 100W main bulb will knock down 70 kW-hr worst case 24x7, which is about 5% of the pump. You'd have to leave it on all the time, and you're probably only lighting the pool a couple of hours a night or just on demand. So, it's probably negligible in comparison to the pump.
You've received many great answers. Electricity is usually one of the cheaper elements of a pool. Chemicals and water will likely be more expensive than the electricty required to run the pump.
As others have suggested, requesting copies of the utilities from the existing homeowner is a great place to start. You can also request their water bill at the same time.
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So not even counting the pool there will be major difrences.
If I may be of further assistance, let me know.