There is kissing between Tom, Becky and Amy. Other than that there's no Sex or nudity.

The Injurin' Joe bear breaks into the church and steals money from the church.

Tom Sawyer gets spanked in school by his teacher using a wooden ruler, even though it's not directly shown.

Injurin' Joe can be seen attacking the sheriff and throwing him against the tombstone and killing the sheriff.

The bats in the cave can be seen attacking Tom and Becky.

Tom burns Injurin' Joes eyes with his torch.

Injurin' Joe gets attacked by bats and later falls to his death. Later on his dead body can be seen.

None.

The Injurin' Joe bear is best know for being a scary villain and attacking the sheriff and chasing after Tom and Huck which may frighten little children.

Tom the cat and Huck the fox while on the raft can be seen caught in the thunderstorm and Tom nearly drowns in the river.

There are bats in the cave which may frighten little kids.