Ok, I'm going to to over general tips first before suggesting teams:

- Fully break through Gaara before 5*-ing him. Do the same for Kurenai once you got her to 4*. Tobi is optional, don't bother too much with him.

- Get your Yamato to 4* and start his skillbreak, he's made for 9tail.

- Do ultimate training and get yourself a Tendo Pain, he's made for TIs, Rescue the Jinchuuriki.

- Save cps so you can get more meta ninjas from events.

As for teams, you don't have a lot of choices currently.

- Your standard lineup should probably center around Minato Jonin. I'd go with Minato, Gaara, Kurenai, Wind/Water main.

- The simplest/most used lineup for 9tail is Yamato, Iruka, Asuma WB, any main as main dmg dealer (stack your main with best equipments and everything).

- The only 2 teams people ever care about for TI/Jin are Tendo lineup and Tendo support lineup.

+ Tendo lineup is typically Mabui, Tendo, Asuma WB, Wind/water main or Tendo, Asuma WB, Konan, Earth/Lightning/Fire main since these 3 can gain the neccesary chakras for Tendo.

+ Tendo support is typically Konan, Chikushodo, Shurado, any main. Or anyone with a field buff that boost ninjutsu/taijutsu for Tendo.

Until you can get a Tendo, I suggest you work on a support team and ask someone who has a Tendo to help.

- For arena, you could just use the standard lineup I suggested. Otherwise, will need to think more on it as you don't have a lot of options to choose from.

- Ranked is tricky, will need to think on it more. For the time being, you can check out my thread on ranked battles tips and tricks and maybe figure something out.

Yep, it is as Angel said, 5*-ing a ninja only increase their primary stats, which are good, but not hugely helpful in battle compare to skill breaking them, which gives additional statuses and effects to their active skills and passives alike. In most case, a 4* fully broken through ninja would be better than a 5* non-broken ninja in battle. In other words, getting a ninja to 5* only makes that 1 ninja stronger, while skill breaking a ninja makes the whole team stronger. So as a general rule of thumb, always skill break ASAP before increasing their stars. In the case of Gaara and Kurenai specifically, skill breaking Gaara gives better defense for the whole team/field, in addition to adding a reliable hard cc to his nuke and his chase, while Kurenai break through makes her an extremely decent support who has heal, shield, and hard cc on standard and chase. Meanwhile, getting them to 5* gives you none of the above listed benefits. Priorities!