tek,
Within reason, No.
TOAD isn't magic, it's just another (very powerful) GUI tool for working with Oracle. If you want to see what code is doing, then you have to debug it. TOAD's debugger is easily the best of the bunch, so you've got the right tool for the job.
I acknowledge the technical possibility of scanning every table in the database and dumping all the records to a file. The sp could be run, and the entire database scanned once more and another file produced. Differencing the two files would definitively show what was added by the sp, but this isn't a realistic approach. Hence my response was "within reason".
If you are only altering a few tables, the before and after scenario is excellent, and is called unit testing. If you're trying to do that, then look up a tool called QUTE from Quest software (the makers of TOAD).
Regards
Tharg
Grinding away at things Oracular