Tuning is THE most important part of the whole turbo setup. Without a tune, you WILL blow the motor, and quickly. Motor needs to be tuned to control air fuel ratio at least... without that you're going to run lean and blow s**t up.
As previously stated, it is going to be very tough to tune, especially since it's an automatic. Not only that but automatic transmissions are very weak to FA (at least on a Honda).
First think before making any purchase - is to research. Then set a budget & power goal. Figure out everything you need to reach that power goal RELIABLY while staying in budget (not always easy). On average, I would say a good tune costs around $500, including chipped ECU or (not recommended) piggyback systems.
Good luck with everything, but PLEASE get a good tune.