Oil pan and Timing Cover seals?

[StrokinThanCummin]

My truck leaks oil like a siv and after running dye through it, It has a few leaks around the oil pan and it also leaking out of the timing cover seals. I look at a few posts and found the past way to do the oil pan is to pull the motor basically... Timing cover seals wouldn't be a problem with by doing that. If there is anything new info or teqniques, It would be much appreciated on filling me in on them. However this brings me to my second problem, because it was leaking so much oil, my dad was running drain oil through it with out telling me because he was sick and tired of putting in 5-6 quarts a week. This caused the turbo seals to fry and now my turbo is blown. While idling and after spooling the turbo is pours thick white smoke out of the exhaust. Also while spooling and spooling down, the turbo makes a mean grinding noise. What are your suggestions on turbos? Rebuild would cost $800+ depending on if the pedistal is bad or not, or i can get a brand new gt38r (I think that's the modle) Garrett Ball-bearing for about $1,500 from xtreme diesel. I know swapping turbo's is very hard, but is there anything I have to do to the truck after switching turbos? My Truck is a 2001 F250 Ext Cab Long bed 7.3L PSD, 4in turbo back, ts 6-pos chip, custom fully built 5spd auto tranny and has just over 270k on it.