engine uses oil and smokes on start up on 2001 Isuzu VehiCROSS

how much to pull heads and pan then to pull pistons, bore to standard diameter, replace pistons/rings and reassemble the engine?

Asked by for the 2001 Isuzu VehiCROSS
an engine runs about $2000 and $1000 to change so $3000 for a used engine and in CA I would guess $5000 to get it rebuilt