Purchased from and reset by who? Which software? If the programs are on the machine, then they should exist in the root-level /Applications folder and all you need to do is double-click them to launch them. BTW, there aren't any user profiles on Macs, just user accounts.
Register at Apple's Express Lane.
Since you appear to be coming from the windoze darkside, see these:
Switching from Windows to Mac OS X,
Basic Tutorials on using a Mac,
Mac 101: Mac Essentials,
Mac OS X keyboard shortcuts,
Anatomy of a Mac,
Switching to Mac Superguide, and
Switching to the Mac: The Missing Manual, Mountain Lion Edition.
Additionally, *Texas Mac Man* recommends: