In reply to CMcBain: Don't forget that a pair of Trango S are not going to be particularly warm.
If money is an issue get a pair of second hand boots, they will still last you for years provided they are in decent nick when you get them.
As for crampons, G12s will do you for most things but a pair of G14 will be slightly more versatile albeit heavier. They are basically a pair of G12s but with horizontal replaceable front points. In an ideal world you'd have a pair of G12 or airtechs and a pair of G20s or darts to complement them.
I spent last summer walking many miles in a pair of Scarpa omega plastics together with G14s without it becoming particularly uncomfortable. Just make sure they fit your feet.