Yes, it will fit. The later ALH+ motors won't fit without more serious modding. IMO, I would go with a AHU if you can find it, it has a few improvements over the 1z.
It will even fit into the mk1 cars but the pass side motor mount is different.
I think all the motor mounts are pretty much a bolt on affair, you need the ecu and wiring harness, the various sensors and pedal cluster, axles, it would be best if you had a donor car that has been hit in the rear.
You won't save much if any money on a swap, I would just buy an older mk3 car instead of swapping it unless you have some other reason why you want to keep the older car.
It will even fit into the mk1 cars but the pass side motor mount is different.
I think all the motor mounts are pretty much a bolt on affair, you need the ecu and wiring harness, the various sensors and pedal cluster, axles, it would be best if you had a donor car that has been hit in the rear.
You won't save much if any money on a swap, I would just buy an older mk3 car instead of swapping it unless you have some other reason why you want to keep the older car.