Filioque is a fucking meme, that's what.
The expression "from the Father and the Son" had been used in the Latin West since the 5th century, its implementation in the Creed and the theological elaborations on what it means for the Holy Spirit to proceed from the Father and the Son were a purely Western development, and Yves Congar makes a good case that from a Greek perspective, it simply means that the Holy Spirit "proienai" from the Son, and that "procedere" is a translation of "proienai" rather than "ekporeumenai." While it's true that it means the fault is with St Jerome for not taking into account the theological meaning "ekporeumenai" had taken for the Greeks, and the fathers of the 3rd Council for using Jerome's (mis)translation, and most of the Latin West for embracing an interpolated Creed, and the overall Church for not convoking an ecumenical council to address the issue (the Greeks were whiny but also just content with not having the filioque in the Creed, while Rome accepted the orthodoxy of the filioque but swept it under the rug as long as they didn't put it in the Creed themselves), in the end, when the Greeks say that the Holy Spirit "ekporeumenai" from the Father alone, and the Latins say that the Holy Spirit "procedere" from the Father and/through the Son, they're talking about different things, and neither side has actually taken the time to see what the other side's conclusions imply.
It would certainly be great if the Catholics recognized the Council of Blachernae as having an orthodox pneumatology, and the Orthodox recognized the Council of Florence as having an orthodox pneumatology. Not because we must be ecumenical modernists, but because we understand the differences between the Latin and Greek theology better than the Fathers of these councils did, on both sides of the "curtain."
So, to respond to your question…
The Holy Spirit can be said to proceed from the entire Church onto the world, really. The Church -is- the Body of Christ after all. He sent His Father's Holy Spirit onto the apostles, but the Holy Spirit was transmitted to the other bishops, and to the laymen, and to converts, and so on.
>Also why would we need a Papa on earth, or Papal infallibility, if the Church/bishops/saints/body-of-christ itself has guidance of the holy spirit?
The exact way in which the Church has guidance of the Holy Spirit is disagreed upon. We can at least say that St Irenaeus's belief that episcopal succession suffices to guarantee orthodoxy was wrong, since we've had more than a few heretical bishops since then, causing several schisms (the Donatists, Nestorians, the Monophysites, the Catholic-Orthodox split) or at least controversies (the Arians, the Pneumatomachoi, the Monothelites).
The early Church simply enough wasn't concerned with that issue, just as they were not concerned with the baptism of converts from heresies. When the issue presented itself, different bishops had different ideas of how the tradition applied. For another example, see the Novatian schism: a new situation presented itself, and different parties appeared because there was no set answer in the early Church and so there was no evident way to interpret the tradition.
cont.