forget about TAG unless you plan on spending 2 years at a CC. All the UCs require 30 units under your belt just to submit a TAG app (which you do in Fall of the year prior to when you want to xfer), as shown in the chart linked by @luckie1367
I suggest making an appt as soon as you can to talk to the xfer counselors at PCC. It is true that at some CCs the counselors may not be well informed, but PCC is the 3rd highest source of UC xfers according to http://www.latimes.com/local/education/la-me-uc-transfers-20140515-story.html