Sawsall
a pry bar
Check parking brake if you use it. Sounds like broken cable.
You can take the front grill off, with some T20 screws on the front of the car. You will see the hood release cable, and the mechanism that it attaches to. Just look at it, and you will be able to figure out how to open it from there.
Zorro - 1990 Broken Heart Broken Mask 2-9 was released on: USA: 9 November 1990
If it feels like the cable isn't broken, pry up on the hood while someone is pulling on the release. If it doesn't work, take it to the body shop.
Broken Badges - 1990 Pilot 1-1 was released on: USA: 24 November 1990
Broken Badges - 1990 Chucky 1-2 was released on: USA: 22 December 1990
Climb under the front of the engine compartment with a coat hanger and a flashlight, reach up and grab the latch and pull it down.
Broken Badges - 1990 Westside Stories 1-3 was released on: USA: 1 December 1990
You can do this buy removing the plastic front radiator grill. You need to remove indicator lights, then the middle screw, then with a small flat screw driver release the plastic clips just underneath the bonnet. Then put your hand behind the bonnet catch and pull the broken cable or the latch and it will open. Good luck
On my 1988 Cutlass Supreme the cable broke at the release point in the car. I was unable to see anything from the outside so in the passenger compartment I took the release handle apart and used a set up pliers to pull the cable and release the hood. There should be just on bolt holding the release in place, it may be covered by the carpet. If it can't be done from the inside you can also reach up from under the front bumper and find the cable where it attaches to the latch. Just pull the cable and the hood should release.