There are a couple of fonts here that i would like to use for my class tee. If they are labeled as free, am I allowed to use them? Also, how do I contact the authors to find out more? I would like to use the Allstar font but no information is given on whether it is free, free for personal use etc. Someone please tell me more, i would really appreciate it!

Normaly, yes, but only the author of this font can give to you a reliable answer.