Blown line going to EGR

[Morty]

My mother in law gave me a 89 turbo for X-mas and while driving to AR from FL check engine light came on then went out and back on again. On second time I put in neutral and the engine died. I put it back in gear again and it ran with loss of power and oil press dropped to 20 with no temp increase. It put out an exteme amount of black smoke. Stopped on side of road and lots of smoke comming from back of engine. Got it back home and the line comming from the back of the engine to the EGR is blown. Checked the turbo and it is fine but the engine will not crank. Is the loss of vacume causing all my problems due to the blown line? Mechanic is telling me I need a new engine, others are saying fixing the line will fix everything. Any opinions out there???