A TRX 70 takes 5W-30 oil for temperatures between 15 degrees and 95 degrees, so it should work fine.
Just regular gas.
10w 40
I had an 1986 Honda shadow VT1100 (loved it) and I ran mid grade with no problems. You can run 87 octane with no problems.
SAE 10w30 full synthetic.
Regular unleaded 87 octane.
Just buy it from your local Honda dealer. Just buy it from your local Honda dealer.
10w40
I just run 10w 30 in mine
H3 you can get one from your local auto parts store
R134a
r12
10W30 or 10W40 motorcycle oil is recommended by Honda.