Definetly get new pup microchipped... peace of mind. When done, check yourself on the websites to make sure your details are attached to your dog. When I got my puppy done, it showed the chip was valid but didn't have any details attached to her on the major websites, only on the breeders site which I thought was a bit stupid. In other words if she got lost in the county where I bought her she might have been okay, but if she got lost up here chances are she could never be tracked. I put her on fido.ie which alot of the vets refer to, they were very helpful getting it sorted for me.
Hope u enjoying your new puppy, you'll have a great time with him/her... best thing I ever bought!