Welcome! and yes a 3sgte will swap into your Camry, but it will require a bit of mechanical fabrication. Its not horribly hard, but its something someone with some knowledge will need to help you out with. The factory Camry 5 speed will bolt up to the 3sgte, no idea about the clutch though. The 3sgte is a twin scroll turbo, not a twin turbo btw.
If the fan seized its likely that the fuse or wire link that powers that fan has blown, if you put a new fan in it and it wont come on be sure to check the fuse boxes.
If the fan seized its likely that the fuse or wire link that powers that fan has blown, if you put a new fan in it and it wont come on be sure to check the fuse boxes.