If your H1B is approved and effective from Oct, then why do you need to apply for TPS? Its July and you have just 2 more months to receive your H1B. I do not see any need for TPS at this moments. You can work under H1B until its validity.

If you apply for TPS (I do not know why? ) but you spend $ 515.00 for TPS with EAD and you get EAD after H1B. So what's the point ? Its useless.