You cannot use attacks used by Super Saiyan 1 and up until you have passed that powerlevel. then you can go up to attacks used by SSJ2's and so on. Here are a list of attacks you have to earn a private lesson to get. Instant Transmission, Dragon Fist, Final Kamehameha, Jubei Kamehameha, ( exceptions can be made with those, Telepathy, Mind Control( must train EXTRA hard for this) and Super Kaio-Ken.