Does internet addiction lead to other types of addictions?

It could: People who develop "behavioral" addictions such as internet are usually more prone to become addicted to other behaviors such as drug and alcohol or gambling even. Their brains get a "high" from the behavior, if one "high" is removed their brain looks for another "high" to replace it. Its called cross addiction.

Lifestyle changes: Any addiction involves an addiction to a specific lifestyle which players a major role in recovery.