There is no one pat answer on how to set up replication. Alot depends on how you want to replicate the data. There are numerous scenarios that can be achieved with replication and each requires different details in cinfiguration.
That being said, there are some general steps to setting up replication.
1) Create replication tables
2) register source tables
3) setup subscriptions
4) Start Capture program
5) Start Apply program
The details for each of these steps vary based on the scenario that you want to implement. Consult the Replication Guide.