Can't do that, I don't think. The account the computer was originally set up with can't be deleted. Wipe the new MBP clean and use migration assistant, direct from computer to computer. Might take a while but will probably be the safest bet.
Looking at the list of apps you have there, some of them may not be compatible with lion. You know about the lack of Rosetta support and all that yes?
..login as root?
will save you an hour reinstalling OSX