#1 is (more) correct. It's probably that A just came in implying from his speech, so the future tense (will) should be used and not the future in the past tense (would).
The third phrase may be correct if you mean the first impression. #1 and #2 refers more to the impression of the school after some time. It could be a transcription mistake too, as "l" sounds in "you'll like" often get agglutinized in speech.
You may check this out for more information:
ENGLISH PAGE - Would