1. The Wizard is a set-up tool and doesn't apply to your query.
2. Amplify can be used to boost or cut individual clip volume. The result will be apparent when the clip is previewed.
3. Under the OPTIONS|MEDIA tab, check the 'automatically normalize volume' box. Also try NORMALIZE - one of the audio effects choices.
See this thread.
If those measures don't help with the final product, come back here for more suggestions.