Bring a note book and someone else. There is a lot of information coming at you, so it's good to write down what you hear and another set of ears. Get contact information so you can ask follow up questions or ask for clarification, etc. Questions you might want answered 1)are there alternative treatments 2) is this the best treatment plan for you
If you do have surgery you will want to know what the recovery time is, how this operation will impact your day to day life, what other treatment might you be getting - such as chemo and/or radiation.
You may also want to assess if this a person and team are one you feel that you can have a collaborative long term relationship. If not you may want to find another oncologist/surgeon.
When I saw the surgeon who performed my Nephrectomy in 1995, he had my CT scans hanging and showed me what the issues where, as soon as I saw that my left kidney was 50% larger then my right, I said "this has to come out, right?",