how much will i earn if i sell full chronos??

Well, it depends on how much did you buy full chronos. But the market value of full chronos is around 2k.
So it means you need to buy full chronos that is less than 2k and sell it more than 2k to earn a profit.

and how about juryo gladiator and marine?

You can check the market price here: http://forum.toribash.com/tori_market.php
Search for the items you want. But not all are the real market price since that are items of users.
You can also check and ask prices here: http://forum.toribash.com/showthread.php?t=102540

For now, juryo has a value of 10k, glad is also 2k, marine is around 6k

wow juryo ehh ok ill collect juryo then

I suggest you buy them individually rather than buying a set. Then sell it as a set. You'll earn more in that way since there are individual items that are way cheaper than in a set.

yeah im doing it right now i spent my 3k fo that things i only need is 5 item to complete it

I also suggest that if your selling sets, sell sets that are not in the market or has a price lower than the market. And also sell highly tradable items like chronos, glad, orc. They are the items which can never go out of the market since they are cheap.
At this time, I really dont know what are other items that are highly tradable since i've been out in the market for almost 3-4months now.

ohh ok