1)
Was it a wooden tower?
1.
Ibn Ezra: It was a wooden podium, like we make in the Beis ha'Keneses.
2)
For what was it made?
1.
Rashi: In order to read the Sefer Torah on it.
3)
Were there more people on the left than on the right?
1.
Malbim: No. Ezra was considered to be on the right.
2.
Malbim, from Megilah 23a: There are six on each side; Zecharyah is Meshulam 1 .
1
Malbim: Ezra (8:15) says "...u'Zecharyah u'Meshulam Roshim" (i.e. they are different)! This requires investigation.
