How to get there from ZTL hotel shenzhen? What is the worth to visit shenzhen OCT East?

From your hotel, you can take a taxi to reach Guomeo Subway Station. At Exit B of Guomao Station, there is a direct bus at 08:45 to reach the OCT directly.
It is worth visiting, so if time is enough, you can choose to go.
The bus takes about half an hour.
The places you metioned are not shows, but the themed activity programmes in the park. The Ecoventure is for enjoying the adventure an the Tea Steam Resort is for wandering and relax.
I think the shows in the park are worth seeing, but I am not sure whether it is suitable for you.

As my ZTL is near Laojei MTR .Can I walk to Laojei MTR and take a train to GuoMeo Subway Station and from there take a direct bus.How long estimate it take from Laojei to OCT? For taking a train can I buy those tourist pass to top up cash whereby I no need use coin to pay the bus fare?

Yes, you are take the train.
From Laojie to OCT, it takes about 40 to 50 minutes.
As I know, SZ does not have the tourist pass card on transportation, so I think you may need to purchase a ordinary transportation card to take the bus, so you will not need to use the coins.