What tools would I need to drop a manual transmission and replace the rear oil seal on back of engine?

have a 1993 Toyota T100 4WD. and I was wondering how difficult this would be for a novice?

also , if have the transmission out of the way, it would make sense to replace the clutch too? how difficult again?

btw, anything can do about the rear engine seal besides this method? any conditioning oils? etc?
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