Yvette, patience is your best friend right now, you cannot rush a relationship with a grey, it takes time to build the trust necessary to form a lasting bond with him.
I would still allow him to come out of the cage, he needs time out to socialize with the family, maybe you can offer him some kind of treat to get him back in when it is time.
Don't worry about his not talking, if he was talking before he will more than likely talk again but when he feels more comfortable in his new home, you have only had him a short time.
Talk to him a lot and include him in conversations to help him be more at ease with you and other family members, but remember it takes time and more so since he is older so be very, very patient.
Others will chime in with additional advice but the two words that you will see the most are "time" and "patience":P