In my opinion, ETEST can be divided into 4 levels, which are equal to Band 4,Band 6, TOFEL and so on. ETEST is not very popular, compared with Band 4 and 6. And it does not include the oral English Test. So, were i you, i would choose ILES or Advanced interpretation course.
TOEIC should be taken after you have passed CET-6,for my part,as TOEIC tests your ability in using English in everyday life.Without enough vocabulary,knowledge about English,it is really much difficult for one to succeed in the TOEIC.
personal idea,advice only.