He isn't doing any of those things, nor can he.
Buses don't run free. They have to be paid for. Daycare has to be paid for. The money has to come from somewhere, and it's not going to come from rich people because they'd sooner just move out like the rest of them have been from New York since Trump eliminated the TARP tax loopholes during his first term.
Same with freezing rents, not going to happen.
And building new apartments? They're all going to build new apartments. New apartment buildings are being built all the time, and their affordable rents are affordable for rich folks and trust fund Hipsters from Ohio.