After Christ's ascension, the Apostles were told to go back to Jerusalem until they had received power. Even after the Day of Pentecost, when the Apostles were filled with the Spirit, they stayed in Jerusalem until they met with persecution at the hands of the religious leaders of the day, particularly a man called Saul.
I'll add that The Bible records Peter going out to Ceaserea, and Paul traveling West through the Roman Empire. Historical works outside of the Bible indicate that John the younger would go to work in Asia Minor, Thomas in India, Peter in Britain, Andrew in Ukraine and southern Russia, Simon the Zealot preached through Northern Africa all the way to Britain, Bartholomew went North through Turkey and into Armenia, a few stayed closer to Jerusalem.
They get killed =S
The apostles received power from the Holy Ghost during Pentecost.
The Holy Spirit came to the apostles on the day of Pentecost. He filled them and they began to speak in new tongues.
The 12 Apostles on the Day of Pentecost.
peter and the apostles
the holy spirit went upon the apostles and giving the apostles inspiration.
To preach the Gospel.
When the Apostles received the Holy Spirit on the Day of Pentecost.
After the day of pentecost the apostles witnessed to the people, they were bold and filled with the holy spirit an spoke in tongues, please note not sounds but in different languages , and the people were amazed
The 12 Apostles receiving the Holy Spirit on the Day of Pentecost.
At least 12 people(the Apostles).
The Holy Spirit, the Blessed Virgin Mary, & the 12 Apostles.
The Day of Pentecost, in the Acts of the Apostles.