Maintenance help on 99 Tacoma

I just bought this 99 tacoma and was told I need to change the rear pinion seal/gasket on my driveline. What all do I need part wise to do this and how hard/expensive is it?

Also, I was told to change the tranny oil/diff and gear oil. What would you all recommend there and what are the specs as far as how much oil to use? A friend was saying you might be able to use ATF in the tranny but he nor I wasnt sure.

I have the 5 spd/2.7L 4x4.

Thanks for any and all help.

 

For manual tranny and diffs use GL-4or5 75w90 gear oil. and as far as the levels go you just fill until oil starts to come out of the fill plug (usually about 1.5qt for front and transfer case, 3qt for rear and 2-3qt for the tranny).

 

Thank you sir!