Thank you all for the useful insight!
He wont eat anything other than sunflower seeds. We've tried everything from almonds to peanuts , plums , cucumber , bananas , brocolli but no luck. Not sure whether this is just due to shear fear or something to do with the previous owner.
The cage is merely a sleeping one as I let the door open and he makes his way to the perch and stretches out there.. Using a stick he fearfully steps up and we guide him back into his cage at night.
When he spread out his wings we were horrified to see his wings were clipped horribly wrong .. his left wing was considerably shorter than the other ( due to his longest primary feather cut for the left but not for the right). How long will it take for these feathers to grow back ?
After reading your advice I'll have to keep it down on the interaction because everyday i try to touch him and scratch his head / back .. he growls but eventually lets me do it due to the fact that he has no choice and he doesn't seem to enjoy it very much.. He even climbed onto my arm , still pretty scared though. So I'm going to start from scratch .. no interactions other than gentle talking.
What kind of toys does he require ? Is a rope inside his cage suitable ? so he climbs and flips around on it. If so , what kind of rope , synthetic or natural?
When i hold up a mirror to him he clicks and puffs up , is this a sign of fear or hostility ?
Thank you again for your advice