I am the Doctor's TARDIS also known as the Ship or the Old Girl. I am a Type 40 TT capsule that he unofficially "borrowed" (we don't say nicked) when he departed his home planet of Gallifrey. It is only recently that I had the chance to tell him that although he thought he was borrowing me, in fact I was taking off with no intention of ever giving him back.
I am a sentient being and do possess telepathic circuits which allow me to communicate with the Doctor, other Timelords and TARDISes. I am now able to communicate with more beings including humans. I gained this ability due to some extensive repairs and upgrades after The Time War.