firstly locate the incoming water pipe,and turn off the water, then drill a 6 mm hole as a pilot hole,through wall,then open it up with the 16 mm drill.
From the kit you bought,connect the self cutting tap to the pipe,and tighten up,ensure you have drained the system down forst by running the cold tap.
Next put pipe through wall, and on the outside connect tap, then drill and screw tp to wall, turn on water slowly and look for drips or a massive leak.
Be aware that if you have a water meter,you will be charged for all water used, acustomer last summer, had been away for 7 days on holiday,and left the hosepipe conected to the outside tap,the next door neighbour decided to water the lawn, but forgot to turn off the water,and it appears it was left running for a considerable time,as the garden was floded,the meter had gone into overfdrive,and the customer was liable, never found out if the threats to the neighbour where real or not,made an excuse and left.