99 4Runner Water pump change...Is it simple?

Hello,

Just wondering how hard it is to change the waterpump on my V6 (3.4) engine with 71K. I noticed a small amount of Anti freeze at the bottom of the skid plate and a thin film on the lip of the oil pan right below the cranck pulley as I opened the hood.

I checked the hoses and clamps and they seem Ok! Do I need to take the Timing belt off? Also, does the Radiator has to come off?

Thanks in advance for your help!
Regads

Yes, you have to remove (and should replace) the timing belt - No, you don't have to remove the radiator.

It is a significant amount of work, but it is a matter of your abilities if you are able to do it or not.