Noob VW standard stereo questions

[MrTurner]

I've got a standard *edit Beta not Gamma* stereo with 6 cd in the boot.  Couple of questions:

1) Does it have RCA out on the back?
2) Can you connect additional speakers (it only seems to have LR balance, no FR/RR)
3) What kit is needed to connect it to a handsfree?  Is it just a telemute lead from autoleads?  I've got a SE HCB300 in the Megane I really like, so would like another
4) Can I get the stereo code from somewhere else as I've not got the manual?
5) Are the VW stereo's interchangable?

[troublestarter]

if it only has 2 speaker outputs then possibly not
if the above is the case then running extra speakers will also be no
a telemute harness will be a standard iso to iso adaptor
vw for the stereo code or possibly vagcom
yes all din size vw stereos are interchangeable