Oh that poor Bianchi! That is an '88 Campione de italia and yes it ewas Bianchi's least expensive 'Italian" model, but they did go with Suntour to have an index drive train.
Becareful removing the cranks. I recommend using a little penetrating spray after you remove the bolts. the use a good crank puller and be sure it is well seated before removing the crank.
If you have the space a bath in Oxecillic Acid (not spelled right) will fromove the rust inside and out. A few better overall pics will help to determine but you may be able to save the paint and just touch up.
The main decals for this year, the Bianchi and the Formula 2 are available on the 'bay by a guy from Australia.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk