In the case of the 1j soarer you will be able to drive the car around without ever tuning it if that is all the mods your doing.
As far as advancing the timing on a 1j? You will need an after market unit to do this, and if you're going to buy an safc as well you might as well look at a power fc.
As for the limit of the stock turbos on a 1j ,most people will agree on about 230rwkw at 14 psi.