Can I buy a walkie -talkie for hiking and climbing on foot?

Can. First of all, you should have at least one country -free intercom (409MHz, 0.5W transmitting power, 20 channels). The distance between the connection in the city is about 500 meters, and the suburbs can reach one to three kilometers for entryment. Then, you can consider taking the license to use the amateur section (430-440MHz, the mill/green wild frequency point in this range).