new to the mk3
 

i have a 92 supra that has a head gasket problem but i have to get that fixed but the thing is i have a friend that has a 1jz for sale with trans its a little more money but is it worth it or just stay with the 7mge non turbo but i want the turbo later

If you've actually got a 1992 Supra I'd keep it more-or-less stock, even if it's currently a non-turbo. Personal opinion of course, but I wouldn't even consider an 1J engine swap for it. Do a rebuild or GTE upgrade with quality parts by a reputable mechanic or shop and it'll be fine.