Here are the mistakes identified and the corrected sentences:

1. **Mistake**: "No mountain in the world is the biggest than Everest."
**Correction**: "No mountain in the world is bigger than Everest."

2. **Mistake**: "Come to my house by bus. It is more easy than the car."
**Correction**: "Come to my house by bus. It is easier than by car."

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1. **Original**: "The weather today is better than it was yesterday."
**Correction**: "Yesterday's weather was worse than today's."

2. **Original**: "That movie was more exciting than the one we watched last week."
**Correction**: "The movie we watched last week was less exciting than that one."

3. **Original**: "No one in his team is more beautiful than Lisa."
**Correction**: "Lisa is the most beautiful in his team."