1. "There will be bread" means: the problem will be solved, don't worry about it. The whole sentence is: "There will be bread, there will be milk, there will be everything."

2, this sentence from the Soviet film "Lenin in 1918" in the mouth of Vasily. During the war, supplies were in short supply, and Lenin's guard Vasily and his wife gave each other a loaf of bread and firmly told his wife that the bread would be there, the milk would be there, and everything would be there. The staple food of the Soviet Union was bread, and bread represented food.