It's now a legal requirement to have any dog over the age of eight weeks microchipped in England and Wales.
Every dog whilst out in public areas must wear a collar with the name and address of the owner inscribed on it or on a tag attached to it.
When in a vehicle make sure dogs or other animals are suitably restrained. Your insurance could be invalid if you don't!
Always seek veterinary guidance on this topic as each have their own guidelines as to when this should occur.
Owning a dog is rewarding and fun. This link provides some general dog care advice