Here is the guide to get T0 set for rogue in Classic WoW
You have to start somewhere, and these sets are by far the most interesting before going shopping at AQ20, ZG, MC or BWL ... Getting your T0 set before level 60 is a good start to enjoy raiding.
if you want to find the best gear, check out our pre-raid BiS guide : Here
Ps: For all classes, the main parts of each set are on the same boss, namely:
Here is the list of all the pieces of the Rogue T0 set with the corresponding bosses:
Shadowcraft Set is intended for the Rogue and the Druid Feral only. Let's see the total of stats that gives you the T0 set and the bonus for each 2/4/6/8 pieces.