I am thinking of changing the stock chainring (Shimano FC-T551, 26/36/48t) on my Surly Ogre to Shimano Deore XT M782 (22/30/40t), which I found online for a 35% discount. Depending on how much needs changed, I might just ask my LBS to do the work as I am a complete patzer. But I would like to have a notion of how much would be involved before proceeding.

First question. It doesn't come with a bottom bracket. Will I need to replace the stock BB?

Second question. Will I need to change the FD?

Third question. Will I need to change shifters/cables?

Fourth question. I guess I will need a different chain for running such a different number of teeth, right? Any suggestions?

Fifth question. Anything else I should be aware of before I start?

For reference: http://surlybikes.com/bikes/ogre/bike_specs