I'm a lube tech at Toyota, you need one of these:
http://www.mactools.com/Product/tabid/120/productid/319637/variantid/310396/Default.aspx
and one of these:
http://www.thetoolwarehouse.net/shop/KD-3253.html
make sure you get one that has the 3/8 drive hole in it, its a PITA to get one that only has the 15/16" drive on it
some guys at my work use a plyers type wrench for the MZ series motors but I havent needed one.
also pick up a long 14MM for drain plugs, your hands will get a lot less sore, some of those plugs are tight. matco makes one part #RBZXL1314
http://www.mactools.com/Product/tabid/120/productid/319637/variantid/310396/Default.aspx
and one of these:
http://www.thetoolwarehouse.net/shop/KD-3253.html
make sure you get one that has the 3/8 drive hole in it, its a PITA to get one that only has the 15/16" drive on it
some guys at my work use a plyers type wrench for the MZ series motors but I havent needed one.
also pick up a long 14MM for drain plugs, your hands will get a lot less sore, some of those plugs are tight. matco makes one part #RBZXL1314