Which variant are you thinking of?
-Operational costs ?
Relatively low, it seems, although I think Lockheed said they could drastically reduce operating costs with the L100J so there must be room for improvement.
I remember seeing a figure of US$7500 per hour, although that's not much use without context. Anybody got better figures?
Is it possible to freight vegetables , fruits & life animals on board or no?
People can - and have - carried almost anything in the C-130.
Whether or not it's a good idea - let alone economically viable - is impossible to say.
Can it cross the Atlantic ocean or no
Yes, in principle. Empty, I think all variants are capable of YHZ
or something like that (say, as a delivery flight). You couldn't use it commercially across the ocean.
Is it equipped with ETOPS or no ?
"ETOPS regulations govern the design and operation of twin-engined aircraft on routes which contain a point further than one hour’s fliying time at the one-engine inoperative speed."
The Herc is not twin-engined.