Chevy Beretta 1995 problems

Alright, so i'm not completely sure what is wrong with my car,
Problem #1

i was told by a friend that looked at it that it was leaking coolant into a steam form through the air conditioning and that was due to the firewall. As well as I was told that my cooling system is not working though it may be due to that and if the other thing is fixed then it would be fixed as well.

My car is also shaking a lot kinda like a really old truck would, but it never used to do that so i'm guessing it could be due to the cooling system not working or when I drove it last and it over heated BAD and shut off the engine and brakes and such.

Problem #2

It is also having problems with the lights, I replaced the lights on all headlights and brights. But when I turn the switch the lights wont come on, my road and parking and brake lights do but not the head lights when I turn the switch to turn it on. I have checked the fuses and all are perfect.

I tried these!

So, so far I have done to try to fix my car:
plugged hole in reservoir,
replaced water pump,
checked hoses (looks to have a leak between a hose and firewall as I said earlier),
checked fuses,
replaced Bulbs.

and that may be it but I cant remember.



i have a 1995 Chevy Beretta.

What do you think based on this info so far?