Symptoms of cataract seeing haloes?

Yes. Cataracts cause halos/glare especially when driving at night, blurry vision, loss of contrast sensitivity (decreased contrast between objects & background ) & decreased vision: even on; these symptoms worse with time. Cataract is leading cause of preventable blindness in world. More info:
Yes. Halos can be caused by cataracts, but also can be caused by anything cloudy in the visual axis (posterior capsular opacity (secondary cataract), corneal edema, corneal scars, uveitis), and can also be caused by uncorrected refractive error (need for glasses).
Can be. Typically halos at night with on coming lights, but halos can also be affected by other things such as corneal edema, large pupil, etc.