Hello Phil and welcome, you shouldn’t have any worries moving the safe- just close the door and turn the handle to throw the bolts. Wise to strap the door up though to prevent it swinging open, should the handle get turned during the move.
With the lock in the unlocked position there isn’t really anything that can happen to lock you out, but obviously this is assuming it’s all intact and working and hasn’t been modified or messed about with.
Any good locksmith can alter the lever settings in the lock and make a key for it, but they will of course charge more to come out and do it.
When you get it home, take some good closeup pictures of it, including the back of the door showing the bolts/fixings, and we can guide you through it if you want to remove the lock yourself.
