Congratulations on your first box break champ! It's a dangerously good feeling isn't it?
The cards that look similar to base but are numbered on the back are parallels #/299 - gold, #/99 - copper.
there are also blue #/49 and black #/1!!!
The rookies are numbered depending on their card number; 101 - 110 #/150, 111 - 125 #/799, and 126 - 149 #/399.
I've got a fair few base cards from this stuff if you want to have a go at putting the base set together. there's 100 cards in the base set (rookies are numbered 101 - 149 and are not considered part of the "basic" set) and you've got the 3 top values (mj, lj, kobe) out of the way already!
It's a nice looking set and it goes some way to getting a bit better value outta your box!
hope this helps a bit, send me a pm if you want any other help...