honetly man, research, theres not an exact price on how much it will cost, dependson what work u can do urself, how much u get motor for, if its fwd/rwd.
it will cost you $7500 for the motor alone (direct from takumi)
then you have to deal with the fuel setup (convert to EFI) thats another $2000
the stock ae86 diff will blow with the 150kw the 4age has... so you will need a hilux diff $2000
you cant drift with a open wheeler, locker? no illegal, need LSD.. another $3000
as you can see... it costs abit, but with MORE RESEARCH it can be done cheaper