Leak in hoses that problem is fixed but now there is a leak under the motor how do I fix it an how much it's gna cost

1996 nissan sentra 1.6 hatch engine still running idle okay but it has very little power plugs or fuel filter havent been changed just happened suddenly not sure what is wrong with it could somebody t… 

Airbag flashing in 2001 Nissan sentra

I can't program the control mayve the alarm is disconected.

starts and stalls many times below 75% and poor gas millage