Usually the cranks have threads to fit an extractor tool. Fit the tool, then wind in the extractor part and it will push the crank off.
If your cranks are very old they will have cotter pins - these are on the side of the crank, instead of in line with the bottom bracket shaft. To remove cotter pins, undo the bolt a couple of turns, then tap gently with a hammer (a bit of wood in between helps stop you mashing the thread).
If you are new to all this (and no shame in that) then have a look at the Sheldon Brown and Park Tools websites.
The cranks are cotterless. Having not touched anything in a bike fettling sense since I was about 17, I suppose I could be described as a noob, basically since going past 30 I have got all nostalgic over stuff from BITD (early mid life crisis!??). I do now remember having to use an extactor, my dad who is an engineer "made one up" for me - I had just completely forgoten about most of the stuff I have done with bikes as there has been such a gap.... thanks for the advice!
Any Bianchi experts on here who can point me in the right direction for year model?