Suspension lift Blistein 5100s

I need help on getting the right parts for my suspension lift kit. I want my lift to be 2.5" and leveled. I don't do very much off roading pretty much just a daily driver on streets. I'm going With the Blistein 5100s all around set to the highest setting. Since I'm a newbee to all this truck lift I need to know what else I need to complete my lift. And what are the pros & cons for lifting your truck? And what's the custom lift that comes with the 15 tacoma prerunner? Any advice would be much appreciated thanks!

 

This is All that's in my truck all stock from the dealers. Wondering if I have to buy a new lift kit or just keep the custom one i have and set it to 2.5"