(nintendo FAQ board is bullshit, doesn't even get close to that specific of an answer, and web searches are failing.

)
as it happens, somebody was looking into this very subject.
theirs was a destroyed optical drive as well. (results pending user response there.)
as you've already picked up the base unit, why not give it a bang anyway, fork out for the game and pro pad.
looked to see if touchscreen/gamepads are available separately, eshit.

(nasty prices, keep digging for a deal.)
you'll run into some cfg issues, as when the wiiu is initialized for the first time (no user accounts/default/stock) it seeks the gamepad and handshakes with it.
the softmod scene is still early days, i'm watching it so my wiu can get cracked, fuck legit!

you will be able to play wii games on either screen, or dual output.
...
there will be some problems on you end, but considering what i read here, this subject seems like a moot question at this point, (no disrespect) you got the base.
may as well try it out and document your findings.
good luck!

FAQ/retail:
http://www.nintendo.com/wiiu/faq oh, gbatemp could possibly help?