1995 Chevrolet Caprice RE: Ticking in Engine

I start up my car and it is ticking I start driving my car I get it to approx. 25-28 miles and ticking goes away. I honestly thought it had to do with my master cylinder because i had lost my brakes three days prior to the noise starting and the noise is right around where the master cylinder is. But replace master cylinder but noise is still there and also I can not get my brake light off. So if you can give me answer on what would be the ticking noise and how to get the brake light off. Thank you :)