new owner 580 sk 4x4 tubo need manual for it.and need to change the engine oils

so I buy this 580 sk 4x4 turbo and I know nothing about backhoe's I need a manual and need to change the engine oil on it .I do not know if the oil is a 2 in one oil for the tranny and engine or there both different??what kind of oil should I buy???I know there's diesel 15w 40 oil and more t5 ,t6 and 43 ,48 ,62? I do not know any of this stuff???is the T stand for transmission oil only??help!:(

new owner 580 sk 4x4 tubo need manual for it.and need to change the engine oils