I'm not aware of any pedal with a "power out" that lets you run other pedals via its battery.
AFAIK the "output" is usually wired as a pass-through from the adapter input on such pedals.
For a small (or large) installation, I'd personally go with a 1spot combo pack, which comes with a 1spot adapter, a daisy chain and a bunch of adaptors to convert to different plug styles. This is a cheap and good solution. I've had no problems using the 1spot to power up to 16 pedals, plugged into 2 different amps, into a PA which routinely picks up AM radio on DI feeds... The only thing that brings the noise is when plugging my old zoom drum machine into the same daisy chain as my effects. I think this is more to do with the crappy zoom drum machine though.
The combo pack will also allow for future expansion - you realise that PT jr is going to look awfully bare, and you're going to need some stuff to fill it up, right? I'm thinking wah, looper, octave, another VT bass and you should just about be there
Steve