Entry
Which visa rules apply depends on your passport. Before booking, ask a Kazakh embassy or look on the government portal to confirm them. Typically you will need an onward ticket as well as a passport valid throughout the stay. Hotels register foreign visitors; keep the slip with you, along with your passport.
Culture and practical - take note
Despite being Muslim-majority, the country is relaxed and secular, and has a nomadic heritage. Shoes are removed on entering a home. Hospitality is central, so tea and food that are offered should be accepted, and a lot of both is to be expected. Greet the oldest people first. Military and government buildings must not be photographed, and permission should be asked before going into border areas. Huge distances make domestic flights and trains the practical way to get around. Comfortable weather comes in spring and autumn, summers are hot, and winters are very cold, with Astana able to reach -30 C. Halal food can be found widely. Main cities accept cards, but take some tenge along for villages and markets. Tourists favour Almaty and its mountains as a base.