Answer:
First temple: 30 cubits tall (I Kings 6:2), with an entryway 120 cubits tall (II Chronicles 3:4).
Second temple: 100 cubits tall (Mishnah, Middot 4:6).
Elevation: the highest point of the present-day Temple Mount is about 740 meters above sea level. There are various theories about where on the mountain the temples were located, so they may have been a little lower than that.