The kanji are just given for reference. Kana spelling is normal today. These words are part of what is called kosoado. The ko, so and a indicate the relation to the speaker, the re turns them into the pronouns for a certain object. The most important thing to remember is that you cannot these words to say, for example, "I want this apple" = "kore ringo ga hoshii." That is wrong. You can only use them for "I want this." ("this apple" would be "kono ringo")
blutorange
kore : near to speaker sore : near to spoken to are : far from both speaker and spoken to