Starship itself could potentially hot launch from the booster in the ground to get away. Hopefully the latching system is controlled by the Starship side.
It almost definitely cannot. It already has a far lower thrust-to-weight ratio than real launch escape systems (1.x at best versus 6-10+)[1][2], and it would only be able to light its three sea-level engines since the vacuum-optimized engines would be unstable and likely rip themselves apart at 1 ATM.*
*correction: Vac raptors can run at sea level in a test stand. Still doubtful that its safe/reliable and in either case it would still be far too slow.
[1] Note that the first G of acceleration is combating gravity, so Starship at e.g. 1.25Gs would accelerate away from the explosion at 1/20th the rate of Dragon v2.
SpaceX doesn't have the vehicle at a point that they can worry about the details of the crew compartment beyond concept renders and operations planning. As it stands they don't even have a plan for carrying large non-starlink payloads yet.
That’s all pretty heavy assumptions considering all we have is public knowledge. Given that SpaceX already has some launch contracts that can be switched from Falcon to Starship I am sure they have plans and probably development for non-starlink payloads going on.
