Where and in what role are you interning this summer(feel free to be vague)? That is assuming you are in a FT program. Hopefully, it is finance related so you can attempt to parlay this experience...
This is a difficult question to answer for a banker as a majority of pay can be from bonus depending on the type of year your group has. OP sounds like he is VERY new to his firm so it is likely he...
Unlikely you can transition. You already blew it by getting an MBA from an unknown school -- that was your opportunity. Unrelated career -> Top MBA -> IBD Summer Associate -> FT IBD Associate offer