'Baptized' in the Bible

Is Christ divided? was Paul crucified for you? or were ye baptized into the name of Paul?

I thank God that I baptized none of you, save Crispus and Gaius;

lest any man should say that ye were baptized into my name.

And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.

and were all baptized unto Moses in the cloud and in the sea;

For in one Spirit were we all baptized into one body, whether Jews or Greeks, whether bond or free; and were all made to drink of one Spirit.

Else what shall they do that are baptized for the dead? If the dead are not raised at all, why then are they baptized for them?