You should ask the PT about nerve glides and exercises to correct the muscle inbalances common in this disorder (esp. weaknened longus colli muscle) as well as trigger point work and stretches, speaking as a person who had a very bad case of TOS.
Aeorbic exercise is very important as well for this condition.
See
www.edgelow.com for a complete home program for TOS availble in kit form. Very good: has all equipment for exercises and video/book to teach them