mtr line and fare in going to and from fareast silka to tsim sham tsui. also to disney

Well, your hotel is within walking distance from Tsuen Wan MTR Station. So you can walk there to catch Tusen Wan Line to Tsim Sha Tsui Station directly. The MTR fare is 8.9HKD per person. For the back journey, you can use the same way.

To Disney, as I know, your hotel provides the free shuttle bus to Tsing Yi Station. At this MTR station, you can take Tung Chung Line to Sunny Bay, where you can easily find Disney Resort Line which can take you to Disney directly. You need to pay the MTR fare of 12.6HKD.

For the return journey, it is suggested to take resort line to Sunny Bay and then Tung Chung line to Lai King. Then the Tsuen Wan Line from Lai King can take you to Tsuen Wan Station, from where you can walk to your hotel. MTR fare is 14.9HKD.