He is Cage trained, no problem staying in cage, can wait for "Yes" to come out from cage while door open, if they make noise, probably want to pee.
Potty trained on grass, not on pad, need to reintroduce/retrain once arrived at new home.
Understand "Sit", "Good", "Yes" basic command. Can wait for "Yes" to eat.
He bark at other dogs and stranger outside. You need to consider where to keep him or cover up the cage or necessarily training.
I can share their vaccination and spay fee.