Catholics: Do you believe that catholicism is what the early Christians believed......?

Did the early Christians (that were before Constantine made Christianity widely accepted in the Roman world) believe the majority of Catholic beliefs? Did they believe in purgatory, the pope, asking the saints to pray for them, confession, the literal blood and body of Jesus in communion, infant baptism, the extra books in the Catholic Bible, and other things distinctly Catholic? When Christians were underground from Roman persecution and only years away from Jesus's ascension to Heaven were they Catholic? Did they believe these Catholic beliefs? Or was this more a by-product of Christianity being Romanized by Constantine? Would these early Christians worship resemble more the Catholic style or Protestant style? NOTE: This is not to bash on Catholics! I am just curious. I have respect for Catholics but I do think a lot of their current practices came with the Romanization of Christianity more than teachings ped from Jesus to the disciples to early Christians.