Well, the way I see it, at least from the point of view as it's presented, is each timelord life gets around about 80-100 years, so they age normally, if a timelord regenerates due to injury (as every doctor bar Hartnell) has, the "extra years" stack up into the next regeneration, so they could potentially live twice ...
It is located in a binary star system 250 million light years from Earth. It was first shown in The War Games (1969) during the Second Doctor's trial, though it was not identified by name until The Time Warrior (1973–74).
Before the Eleventh Doctor's 200-year farewell tour between TV: The God Complex and Closing Time, the writers of the 2005 revival of the series explicitly described the Doctor as around 900 years old, despite contrary statements on TV and expanded media.
Doctor Who - Day of the Doctor: The Last Day of the Time War
Are Weeping Angels Time Lords?
The Weeping Angels being disgraced Time Lords creates a classic Doctor Who time travel paradox - the Time Lord punishment was inspired by the Weeping Angels, but the Weeping Angels were created by the Time Lords' punishment.
As much as it annoys me to say it, the evidence points towards Gallifreyans not being able to regenerate, at least without Symbiotic Nuclei. One case of such is when we see Gallifreyan citizens being slaughtered by Daleks. On the other hand, Daleks have some pretty goddamn good weapons.
The simple answer is that we do not know. River's method of learning the Doctor's name has not yet been shown or explained on-screen. It is strongly implied that she knew it before she died in the Library, however, as it's the Doctor's explanation for why he trusts her.
Towards the beginning of his quirky lifespan, the 11th Doctor told Amy Pond that he was 907 (“Flesh and Stone”). After centuries of wandering about with a couple different companions, he wound up around 1,200 years old when he met the War Doctor and the 10th Doctor in “The Day of the Doctor.”
The Gallifreyan alphabet was created by a fan of Dr. Who named Loren Sherman. He created this way of writing so he could transform English words to mimic the artistic representations of the Doctor's native language, Gallifreyan. It is not used by the show and is not a real language.
Assuming they did not, it would appear that Melody Pond/River Song gave up TEN incarnations (9 regenerations) to save The Doctor. First Regeneration - while homeless, young Melody Pond apparently succumbed to hunger & illness, undergoing her first regeneration in the episode "Day of the Moon".
In Doctor Who, Time Lords are canonically genderfluid, in that their genders can change between incarnations. Time Lords transform their bodies in order to prevent death, giving them a new personality each time they undergo this process.
On The Wedding of River Song he whispers, "Look into my eye." and then lies and says that he just told her his name. That's when River realized that what he whispered to her when they first met was his name.
The mid-season cliffhanger shockingly reveals that Amy Pond gave birth to a child at the hands of Madame Kovarian, who is destined to be a weapon against the Doctor. That child of the TARDIS, conceived with sometimes alive/sometimes dead person Rory, is Melody Pond, aka River Song.
This question seems to be based on the idea that if the Timeless Child is from some other race, and we know that Gallifreyans/Time Lords have two hearts, it's therefore a coincidence that the Timeless Child/Doctor has two hearts too. But it's really not. There are a multitude of possibilities here, so take your pick.