1. you need a thermometer to tell if it is overheating, they make handheld ones for about $20
2. can you reword the brake issue, its a bit confusing to me, are you saying that if you give it 100% throttle is rolls easier than when its at neutral?
3. i wrote this guide for inexperienced people who want to learn like you, please read it multiple times to get the idea of things http://www.rcuniverse.com/forum/m_5517128/tm.htm also, there is an FAQ guide on the 2nd page, read that too