question

>> Or how can i purchase item for player (it's simple) and then move it to character?

If you mean only players can have virtual currency and one player can have multiple characters that share the player’s virtual currency. There is a Server API MoveItemToCharacterFromUsercan move an item from a user's inventory into their character's inventory.

Since all Server API can be accessed by CloudScript. You can construct a CloudScript function to call this API to move the player’s items to the character, then call it via ExecuteCloudScript on clients.

handlers.moveItemToCharacterFromUser = function (args, context) {

    if (args && args.CharacterId && args.ItemInstanceId)
        var request = {
            PlayFabId: currentPlayerId,
            CharacterId: args.CharacterId,
            ItemInstanceId: args.ItemInstanceId
        };
    var moveItemResult = server.MoveItemToCharacterFromUser(request);
    return {
        moveItemResult: moveItemResult
    };
};

When you call ExecuteCloudScript on clients, you should provide the CharacterId, ItemInstanceId K/V pairs as args.

var purchaseRequest = new PurchaseItemRequest {
    ItemId =
        "LegendaryArmor", VirtualCurrency = "GC", Price = 500
};
PlayFabClientAPI.PurchaseItem(purchaseRequest,
    (PurchaseItemResult purchseResult) => {
        Debug.Log(purchseResult.Items[0].ItemInstanceId);
        var moveItemRequest = new ExecuteCloudScriptRequest {
            FunctionName
                = "moveItemToCharacterFromUser",
                FunctionParameter = new Dictionary < string, string > {
                    {
                        "CharacterId",
                        characterId
                    },
                    {
                        "ItemInstanceId",
                        purchseResult.Items[0].ItemInstanceId
                    }
                }
        };
        PlayFabClientAPI.ExecuteCloudScript(moveItemRequest,
            (ExecuteCloudScriptResult executeCloudScriptResult) => {},
            (PlayFabError cloudscriptError) => {});
    },
    (PlayFabError error) => {});