#to preserve you as a remnant in the earth

"so that you and your families would not completely perish from the earth" or "to make sure your descendants would survive" (UDB)

#to keep you alive by a great deliverance

The abstract noun "deliverance" can be stated as "rescuing." AT: "to keep you alive by rescuing you in a mighty way" (See: [[:en:ta:vol2:translate:figs_abstractnouns]])

#he has made me a father to Pharaoh

Joseph advising and helping Pharaoh is spoken of as if Joseph were Pharaoh's father. AT: "he has made me a guide to Pharaoh" or "he has made me the chief adviser to Pharaoh" (See: [[:en:ta:vol1:translate:figs_metaphor]])

#of all his house

Here "house" stands for the people who live in his palace. AT: "of all his household" or "of all his palace" (See: [[:en:ta:vol2:translate:figs_metonymy]])

#ruler of all the land of Egypt

Here "land" stands for the people. AT: "ruler over all the people of Egypt" (See: [[:en:ta:vol2:translate:figs_metonymy]])

#ruler

Here Joseph means that he is ruler in second place to Pharaoh, the king of Egypt. (See: [[:en:ta:vol1:translate:figs_explicit]])