Why is the toolkit readily high? isn't it mostly reference
For this reason (description from DriveThruRPG):
Description:
NEVER GO IN UNARMED! When you go into a tight spot, you go in prepared. One gun might be good, but two is better. And two guns and a grenade launcher is better still. Throw in a spellslinger to watch your back, and you're on to something. Runner's Toolkit is the well-stocked arsenal all runners should have, the ultimate accessory to the Shadowrun, Twentieth Anniversary core rulebook. Inside you'll find:
On the Run, one of Shadowrun's most popular introductory adventures;
Contacts, Adventures and Sprawl Sites, a booklet that gives you the who, the what, and the where to launch runners on new missions;
The Pre-generated Auxiliary Character and Kit System, a modular system that makes character and NPC generation simple while keeping characters highly customizable;
Anatomy of a Shadowrun, a two-column book; one column tells the story of a high-stakes run, while the other details the tests and rules that players involved in the run would encounter, giving gamesters insight into how a Shadowrun game flows;
Six quick-reference sheets that, with the gamemaster's screen, greatly reduces the time spent flipping through books to find a particular rule;
A book compiling tables from Arsenal, Street Magic, Augmentation and Unwired—it's the ultimate shopping list for runners!