I don't understand what you're looking for in the job changer NPC, could you elaborate?
If nobody has helped you by the time I'm off work, I'll help you with the stat seller.
EDIT: After spending a bit of time merely browsing previous rAthena posts, I've found some scripts that add stat points, but they literally add 'status points' of which you'd need 2+ to gain a single Str/Agi/Vit/Int/Dex/Luk.
I'm not so certain that you're desired script is possible without some source edit? I'd suggest contacting Emistry through his site. If I'm not mistaken, it exists for scripting support.
Best of luck,
~Azura Skyy
hi bro thanks for this comment of yours...
anyways im done with the job changer npc and for the stat seller npc i just edited the one you posted and thanks for that