how do turns work?

its 5 turns if ur 5 players right? elder mook can get 5 H or 5 F

Generally "turn" means each player turn, yes. "Round" means once around the table (ie: each player gets one turn.) Sometimes FFG's language is not always precise, though.

(R page 15) A hero must still wait to equip any cards he receives until the start of his next turn

shuld it not be round?

No, it's turn.

can one player start his turn refresh all cards equip items and whit his last movment trade one of that item to another that then start his turn to equip same item

Yes, heroes can do this. Although it does require that each hero takes a Move Action on every turn if they want to pass stuff around. Trading can only be done "during a Move Action" so spending fatigue to get MP - or any other means of gaining MP - does not allow you to trade, if you didn't take a Move Action that turn. Note that abilities which grant movement are not necessarily considered Move Actions. Unless the ability specifically uses the words "Move Action" it won't work. The same loophole that makes certain movement abilities immune to things like Immobilize also makes them ineligible for trading.

This will also mean each hero only gets one Attack per turn, which will significantly limit their potential damage output. Constantly passing items around will also require the heroes to stay relatively close together, which makes them more vulnerable to AoEs and getting blocked into a single tile area by monsters covering all the exits, etc. As OL, you can adjust your tactics to punish this behaviour.

then the sun stone from LOR is rly OP

( http://vignette1.wikia.nocookie.net/descent2e/images/8/84/SunStone.png/revision/latest?cb=20141229200637 )

u dont need to exhaust it so all heroes then gets one more green die on all attacks

The Sun Stone is a very powerful relic, but given the Move Action limitation above, I think most people agree that this sort of round-robin tactic isn't really worthwhile.

do u need to equip potions to use them?

No, only items with an equipment icon in the corner require equipping (1 Hand, 2 Hands, Armor or Ring (Other))

One further clarification ... Steve-O is correct in that to be able to trade with other players, you must have declared a move action. After doing so, however, unlike D1e, trading does NOT require you to use any movement points.

From the Base Game Rules, Page 15:

only 2 heroes needs to use a move action to get one item from another player attack and then give to someone ells then?

Hero 1 may:

-Equip "Crazy Bow"

-Perform an attack with "Crazy Bow."

-Perform a move action, and while adjacent to Hero 2, trade "Crazy Bow" to Hero 2.

Then, Hero 2 may:

-Equip "Crazy Bow"

-Perform an attack with "Crazy Bow."

-Perform a move action, and while adjacent to Hero 2, trade "Crazy Bow" to Hero 3.

Hero 3 can do the same and pass off the bow to hero 4, and then hero 4 can do the same and pass it back to hero 1. It wastes a lot of actions, but it is possible.

Only one hero needs to use a move action to trade an item. That uses up one of that hero's actions, but gives him movement points he can use to move after or before the trade.

Just a question, but do you use the Core game's reference cards? They've helpful for knowing the order in how a hero's turn works. You can flip or exhaust it too so you can keep track of which hero already has had a turn. if you don't do it, I suggest looking them over.

Hero Turn order:

Refresh Cards

Equip any items.

Perform 2 Actions.

Any hero that hasn't had a turn yet can Equip any item in his possession. If he spent a move to trade for an item from another hero, he's already passed the point where he can equip the item. That hero will have to wait until his next turn. But if another hero spends a movement point to give an item to your hero, then at the start of his turn he may equip it. Hope that makes sense.