Bells, you must have bells... that is what Timber would say. Other than that, his favorite "toys" are the forage boxes I put in the bottom of the cage. I just stuff cardboard boxes with shredded paper, nuts wrapped in pieces of coffee filter, wooden beads (bird safe) etc. He is also fond of the roll of adding machine paper that hangs in his cage. He isn't big on chewing hard things (like the shred-able wood items you can buy), but that is an individual preference. They are as unique in their toy preferences as in other ways. You will just have to "figure out" what he likes. I am not sure about rope, someone with more experience can address that. Timber has a boing in his cage that he hangs on and eventually chews up (fun on several levels).
Sorry to hear about the bad clip! I just read on the forums recently that it can take up to two years for all the feathers to grow back, so don't get discouraged if it doesn't happen quickly.
As to the food, a lot of our greys are picky, picky, picky. You might try hanging a skewer of fresh veggies in his cage so he can examine them and test when no one is around and he is feeling more secure. That's the only way Timber will eat raw veggies. I put cooked sweet potato, grain mix stuff and other fresh food in a separate bowl in Timber's cage. He never eats it all, but there is evidence that he has at least picked at it. When I first got him, I didn't think he was eating hardly anything. Someone here pointed out that he is a bird, and doesn't wolf down the quantities of food I'm used to with dogs and cats. The point being that if you leave something for him in the cage, it doesn't have to be all gone for him to have "sampled" it. Keep trying with the food. When he gets comfortable, he will probably start trying the new stuff. If you haven't tried it, try feeding him something like mashed sweet potato (like body temperature) on a spoon. Timber will try anything I give him on a spoon. He may spit it out and look disgusted, but he will dip his beak in it The forage things might work with him too. Hide the almond (if you are using them in the shell, crack the end off with a nutcracker to get him started) in a box with other bird safe stuff. They have a natural instinct to forage, and will sometimes eat the prize they have found even if it isn't a favorite. Hope this makes sense!
Don't give up! Patience and continuing to offer him things wins the day.