Please help.
 

I recently bought a 2007 audi a4 and after 2 days of having it the check engine light came on it had a 30 day or 1000 mile warranty on it so i took it back to the used car dealer i got it from hey cleared the light an chalked it up to bad gas although i only use 91 or higher. Then 25 days later the car misfires on cylinder 4 looking at the coils it looks all of them needed to be replaced, aswell as oil leaking into cylinder 3. Though im still in the 30 day part of my warranty it has expired because i was about 500 miles over the 1000 mile part does the dealership have to payfor the coils? And if it turns out to be a bigger problem like a blown head gaskett or cracked block does that fall under the lemon laws? I live in maine. As of now i have agreed to pay for some of the work if its just the coils.