Help with a Exhaust Manifold Replacement, Can I get some help?

I have a 2K taco and need some step by step direction for the replacement of the exhaust manifold and also where to go to get a replacement with the best warranty and longevity of lasting. Any help would be greatly appreciated.

 

This is a link to the 2001-2004 manual it is for a 4 cly your profile doesnt list an engine. getting the exhaust off you should soak the bolts nuts with penitrating oil and tighten lossen slightly to work the rust out of the threads. If you just turn them off you may break one or two so work them back and forth and lubricate. I would buy another manafold from Toyota, search the web for discount parts dealers so you don,t pay retail