Hai Vinesh, this is a non stop train from LTT to ERS. and so it wont be stoping in TCR. What u can do is
1. When the train passes SSR ( Shournour Jn) Pack all ur things as the train will take only 30 minutes from SSR to TCR. If chance for clearance of signal the train can Stop in TCR. then u can get down there.
2. In case if it dont stop there. be cool and get down at ERS. From ERS catch the next train to TCR.
3....
more... Get down at ERS and ask any person to the way to ERS main bus stand as u can walk inside the platform and then u can see the main bus stop From there regular 10 minutes busses are available from ERS to Thrissur. U can get into Thrissur direct busses, Palghat busses etc. Make sure u get into Fast Passenger Busses to reach Thrissur Early.
My suggestion will be to travel in Train itself back to Thrissur.