I'll try and answer some of the bfing questions, but I will warn you it is something I am very passionate about!
Firstly, mostly of what I write will be from my experiences, however it will always be different for others.
Expressing - there are no rules about when you should start xp. However, it is recommended that you wait until your milk supply starts to level itself out (often about 6 weeks)
There is the concern that your lo can suffer from nipple confusion if you introduce a bottle/dummy. The mouth action of bf'ing and bottle feeding is very different for the baby so they can get confused between the two, which can then mean their latch can go pear shaped - not good.
Manual pumps vs electric pumps - well, I'm sure the majority of research would say that electric pumps are more affective. However some people have no problems with a manual pump, and at the end of the day it depends on how much you want to spend.
You can hire pumps from some local branches of the NCT (you don't have to be a member to hire it), they tend to be double hospital grade ones.
I'm going to put my neck on the line and say that if the only reason you want to xp is so your dp can bond with your lo then I wouldn't bother. There are other ways to bond - cuddles, sling, bathtime.
The reason I have expressed in the past is so dh can give the lo a dreamfeed while I go to bed early and try and get a stretch of a few hours sleep before the night feeds start
I think the biggest tips I could give about bf'ing is read up on it and do your research. We spend hours and hours musing over the birth, but actually the birth is a really really short part of it all. One of the most time consuming parts of being a mum is bf'ing, so it makes sense that you find out as much about it as possible.
Some people attach the baby to the breast straight away and they don't look back, however others have different hurdles to overcome to keep bf'ing (thrush, mastitis, slow weight gain etc), however those hurdles can often easily be jumped and cleared if you have access to the right help (BFN, NCT, La Leche).
Petalouda - I know nothing about PKU, but if it happens that your lo has it, before you stop bf'ing please speak to the BFN about what their recommendations are. It is truly shocking how little bf'ing knowledge Health Care Professionals have. I'd hate for you to be in the situation where you stop bf'ing then find out that you couls have carried on after all.
I think I'll shut up now as I'm even boring myself!!