Correct. The springs are stock, or are at least the stock measurements all around. The PO put on the 3 inch BB and "supreme suspension" shocks, which are ALL but supreme...
Yes - Stock control arms
Transfer case - No, not that I know of.
Front track bar, yes, stock.
My preference would be to replace the 3 inch BB the PO put on because from what I've read, and been told, that's pretty damn massive. New shocks and springs all around too. I do some off roading, although around here there aren't any rock climbers or anything like that, mostly mud/dirt type of things.
Do you know if it's been regeared for the 33s?
Knowing that you are keeping the 33s, there is work to be done. Like Rob said above, we need a realistic budget that includes labor unless you are certain that you are doing everything yourself.