Too many questions:

If you lived in it you can continue to claim it as tax free by making an election under section 118-145 for 6 years, you can reset this clock by moving in again. You can apply this to 1 property at a time.

If it is disposed of at non armes length then Market Value applies for CGT and stamp duty

There is likely to be a capital works deduction available on the building if under 40 years old and you can depreciate many items in a house - HWS, A/C, Light fittings, retic, oven, cooker garage door and remote etc etc Best to send in a quantity surveyor for $500 to ascribe a value to these things.

But it must be income producing not your personal residence.

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Arguably my Automobile is Awash with Alliteration - Subaru Sti S202