Almaty is a slushy mess - even in January. You need waterproof boots or simialr with very good traction. And you need to pack flip-flops for showers. They really do not seem to sell them here. I have looked for hours.
Currency - Tenge. What you bring in spend it (or declare it) all as it is a real hassle to bring out more money than you declare (when coming in)
Voltage - Same as United States (2 pin 220V) - bring an adaptor for you cameras, phones etc
Most people in Almaty do not speak English so it is best to come prepared with a good Russian phrase book. Part of my excitement when I learned I would be going to Almaty was I was eager to practice my Russian that I had taken in college.
But that was 7 years earlier and I needed a quick and handy refresher so I bought RUSSIAN AT A GLANCE, by Barrons. This is a great asset to your travel to Almaty. There are some great phrases for everyday conversations. It is also great because it comes with a protective plastic cover and is small enough to fit in your pocket.