As far as I know, symptoms are different for everyone. There is no definitive test that can say you have TOS and no definitive "symptom" either.

For me:

5. numb pinkies / half of ring finger
4. pressure/pain in forearms and inner side of elbow
3. immediate loss of blood flow when arms are bent or overhead
2. extreme nerve screaming in entire arms (i work real hard to avoid this)
1. finding oneself, without even thinking about it anymore, avoiding most activities in life