Pastor, Elder, Bishop, are all the same thing. Titus 1:5 KJV For this cause left I thee in Crete, that thou shouldest set in order the things that are wanting, and ordain elders in every city, as I had appointed thee:
It is what Paul wanted in every church.
And Looking at the context, Bishop is the same thing.
For this cause left I thee in Crete, that thou shouldest set in order the things that are wanting, and ordain elders in every city, as I had appointed thee:
6 If any be blameless, the husband of one wife, having faithful children not accused of riot or unruly.
7 For a bishop must be blameless, as the steward of God; not selfwilled, not soon angry, not given to wine, no striker, not given to filthy lucre;
8 But a lover of hospitality, a lover of good men, sober, just, holy, temperate;
9 Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.
Then in 1 Peter 5:1-3 Peter lays out what elders are to do.
The elders which are among you I exhort, who am also an elder, and a witness of the sufferings of Christ, and also a partaker of the glory that shall be revealed:
2 Feed the flock of God which is among you, taking the oversight thereof, not by constraint, but willingly; not for filthy lucre, but of a ready mind;
3 Neither as being lords over God's heritage, but being examples to the flock.
Feed = Poimanete the verb form of pastor, as in Ephesians 4:11 the only place pastor ever appears in the NT. Poimenas
Anyway, Bishop, elder, and pastor are all the same thing.
Edit: Looks like Ransom beat me to the punch.
