1995 Ford Thunderbird iM stumped!

Hey guys this started about 2 months ago the car will run great for about a month or so then u can get in it the next day and it wont crank up at all and when it dose it im not getting no fire from the plugs but im getting plenty of gas presher I was thinking my coil packs might be bad but like I said itll run fine for a month then its down for a couple weks then I was thinking it might be me computer but im trying to pin point down what it is cuz I dont have alot of money to put in it and also my enigion messed up befor I got the car and they put a toggle switch to the starter to start it from the toggle so I dont know if that also might be the problem well ok guys get back to me if u hav any answers for me hope to hear from u son