$2.50, carousel is $2. They sell passes too
20 rides was $31
They are around $3/person, but you can also purchase a 10 or 20 ride pass, I believe the 20 one is around $30, but there's a discount if you have a Toledo zoo membership, which pays for itself in about 2 visits and has extra benefits and discounts.
$3/person. You can purchase a 20 pass for $27 I believe.
The train rides are usually around $3 or $4. You can buy a 10 ride pass for $30 (i think. Its close to $30. They also have the adventure membership which is $199 extra and includes unlimited train and carousel rides, 4 zipline tickets and 4 tickets to the fall lantern event.
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