Sometimes you can purchase new shock/strut assemblies complete with springs (not knowing how the Toyota is configured).

I've done spring compression/installation on several vehicles over the years. Have owned, used, tossed a few different devices. It's not too difficult, just realize you have a lot of stored energy and need to treat it like a gun (mentioned above). When compressing the spring for install, I always placed it on a bench (horizontally) either end pointing in a safe direction (typically towards the neighbor's barking dog).

During the install, getting the spring lined up correctly with the existing rubber/plastic mounting parts is important prior to releasing spring tension. Slow and steady. The compression tools (discussed above) will do the trick. I use an air wrench to speed up the compression, but you need to watch out for the compressors 'walking' along the coil. They need to be kept 180-degrees opposite of each other.

Probably budget an afternoon, and make sure you share any stories with us (starting fires, yelping dogs, etc..)