Gen 3 brake booster assembly replacement

I have a 2010 prius w 130,000 m and a brake booster pump running every 10 sec. I have owned this car for 11 years and had no problems until now. I still have no warning lights. I plan to change the brake booster/actuator as my first step, and I am trying to use BAM AUTO for the part(s), but only if their OEC claim means genuine Toyota parts. As a new member, I have some questions.
1. Would you advise me to steer clear of BAM Auto?
2. Can I use techstream and complete bleeding procedures without a scanner?
3. If I go forward w the Techstream plan what dongle and cord would you recommend I buy?
4. At some point I would like to buy a scanner. Do you have a recommendation?
Thanks, in advance for any advice!

 

Thanks for your thoughts on this project! I am trying to make this a fun thing to do in retirement, but it’s wearing me out just to think about it, haha. Your thoughts on the Techstream and the Autel AP200 (I looked but couldn’t find one) are on the same page as mine. I looked harder at BAM reviews and decided to NOT to go in that direction. A friend found a Toyota dealer close by that has good prices but I haven’t pulled the trigger yet. I am questioning my thinking about replacing just the booster. Maybe I should do the pump n accumulator while I’m at it. Might be even MORE fun. Definitely more money.