Pensamiento judío sobre Génesis 24:15

Problems in the text of this chapter: 1) Why does it state in chapter 2,4 "When they were being created" (if one ignores the Midrash on this)? 2) What do the toldot hashamayim, descendants of heaven, mentioned in that verse refer to? If it is a reference to the whole six-day cycle of creation, then the words "on the day G-d made them" is contradictory! If these words are connected with what follows, however, i.e. the state of vegetation prior to rainfall, i.e. that all vegetation is the direct result of rainfall, then the letter vav at the beginning of verse five does not make sense! 3) At any rate, why does the Torah report what went on before there had been any rain? Why was there a need for rain as long as man for whose sake the rain was needed had not yet been created? 4) If it did not rain because there was not yet anyone who needed the rain, i.e. man did not need to till the earth, why bother with the eyd, mist that rose from the ground? This all the more so since rain is the result of vapors that rise from the ground! 5) The customary use of the word terem suggests that something has been omitted, namely whatever went on before "terem.” Examples are Genesis 19,4, "Before they could lie down, the men of Sodom had already arrived," or Genesis 24,15, "Before he had finished talking, Rebeccah arrived." What is the meaning of the word in our verse? 6) The normal syntax would have required a sentence such as "Before there was rainfall no grass could grow on earth." Why does the Torah employ such a cumbersome syntax?