Survivor since 2012
Gosh, treatment options depend on so many factors and usually are different with everyone. You don't mention what Stage your cancer is, but with ITC and ILC I would imagine you'll be in for surgery, radiation, and chemo. Beyond that I really can't say either how long any treatment will last, or what type of surgery you'll have.
My personal recommendation, and what I did, is to be aggressive. Go for whatever they recommend and push for anything more that is reasonable and that your doctor will agree to. Best of luck to you, and keep us posted!