Lanisoh - I only got through about 1 tube before I stopped needing it, it's expensive but it goes a long way, though I'd suggest two tubes so you can have one upstairs and one downstairs, or one in the house and one in the changing bag. I couldn't find my arse with both hands on the first few weeks so multiples of everything saved me wondering the house looking lost.
I got a hand pump to try it first (didn't want to spend unnecessarily), and expressed occasionally from five weeks, then once a day from about 7 weeks. I got an electric once it was obviously working, and they are so much easier. Our aim was to feed one bottle a day but in the end I just found it easier to feed her myself in the early days (because you'd have to express that feed anyway, so it's like twice the effort) so saved the milk for a bit later, when I could miss a feed without feeling like I was going to explode.
Leakage and breast pads is different for everyone, I didn't really need pads after the first couple of weeks but SIL really does. I only used disposables, they were pretty shit, so washable are better if you need them.
Agree with whoever said 'let it all hang out' for the first week or so.
Don't put off calling the bf support people, that's what they're there for. It you think you might have mastitis go straight to the doctor, it's not worth being British about it.
Blocked duct (feels like a lump) or mastitis (hot, read, painful, and you feel like you've got 'flu), hot shower, massage from outer breast to nipple, hand express. Also keep feeding as much as you can. I really wish someone had told me this in advance!
I found bottles of water everywhere really helpful (OH can help by keeping these topped up), you get really thirsty while feeding in the beginning.
And congratulations and good luck!