I use http://maildrop.cc/ as they are basically fake emails that take no info to create, for botting, nothing in f2p is good. Invest some cash into RS and you will see a return most likely. Some low-skill p2p botting methods are cannonballs, motherlode mining, agility (believe it or not you can make 6m from doing 1-80 but its not really viable) or you can make an account for killing things like dragons or using frost barrows.