I have no idea what you're straying into... but I think it's pretty irrevelant. You asked people who they think would win and they gave you their opinion, but you continue to ramble on about stuff that's like, not even relevant. I know there's always gonna be a bit of debate when it comes to a 20 year old animated Japanese cartoon with dozens of plotholes, but why is this important?
Future Trunks(First Arrival) > Cooler
Trunks had decent Ki attacks, and his sword was pretty lethal. I'd say Trunks could make short work of Cooler with his sword.
Metal Cooler > Future Trunks(First Arrival)
Metal Cooler pounded SS Goku & SS Vegeta, and seeing how Goku and Vegeta were both far more powerful than SS Future Trunks, and needless to say were better fighters with better Ki attacks, I think Trunks would fall a lot faster fighting Metal Cooler than any of the androids.
Future Trunks(Ascended) > Metal Cooler
"USSJ", "Super Trunks", owned Cell (2), and in his second form Cell was a lot stronger than Android #18 & #16(Cell (1) was more than likely stronger than Metal Cooler). If Trunks were to go to Stage 2 of "USSJ" he'd probably kill Metal Cooler's brain with one Ki blast, and destroy the Metal Coolers within seconds, probably while only using his elbow.
In any case, the Dragon Ball Z movies have no real credibility.