Probably hundreds of different ones on youtube, here is one:
1996-2002 4Runner Stereo and Speaker Install - YouTube
May want to search our site here, lots of how to above in the DIY and Informational Sticky threads, luck.
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2001 Limited 4WD - 340+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.