Naaahhh!
Just change the belt and look at the brakes for wear. My 97 LE only has one belt and it is on the passenger side. I change that at 45K miles and morning squeeking/cherkin stopped completely. With the right tools it was pretty straight forward.
You can look up your maintenance schedule here.
http://smg.toyotapartsandservice.com/guides.php
I don't recommend ANY treatment. Just buy quality fuel and your system will stay clean. The only exception might be Seafoam (at walmart,autozone). I use that in my boat motor and it works great. People sewar by it so I might put a can in the gas tank. Chevron Techron is also well thought of.
That said my last two vehicles got 180K miles on them with no gas treatment at all and no problems with fuel injectors or fuel pumps. I run Exxon, Shell and Chevron exclusively (I have an Exxon card so I get 3% off at exxon stations and my rebates are redeamed for free Exxon gas).
Also have a look at your break pads. I changed mine out at ~ 45k miles because they were squeeking (down to the warning spring). blead the break fluids while I was at it using the mityvac.