tommi atkins, those verses are specifically addressing Jews and Christians. As in they already believe in God, prophets etc. So the verses posted are not there to proof all those things, since the people it is addressing already believe in those (Including prophet Abraham). There are other verses in the Qur'an talking to people that are neither Christian or Jews.
What the verses are simply saying, is that since both Jews and Christians believe in prophet Abraham and his religion and all, why are they saying one has to be Christian or Jewish in order to be right? Abraham was there before Christianity and Judaism, and the Qur'an is simply saying to them, follow the religion of Abraham and not religions that were created many years afterwards.
Again, those verses are only addressing Jews and Christians, so no need to prove to them things that we as Muslims and them already believe in.
[3:67] Abraham was not a Jew, nor yet a Christian; but he was an upright man who had surrendered (to Allah), and he was not of the idolaters.
Hope that was helpful
