Optometrists, what does this prescription for new glasses mean?

I had eye exam yesterday, and was given a script for glasses. It reads:

right = sphere -0.50 cylinder SPH
left = sphere -.75 cylinder -0.50 axis 065
Lens Type SVL
Tint/Coating ARC (I know what this is)

What does this mean, in layman’s terms? I was told that my right eye is fine. If that’s true, why can’t I see the numbers on the bus with my R eye, when my L eye is closed? What am I "supposed" to be able to see?
Will my eyes worsen rapidly without glasses? It was recommended I use them only for distance, and remove them for reading/close work (which is 90% of my life). I am wondering if it would be OK to maybe not fill the prescription, since I don’t have insurance, and get glasses a little later. Are my eyes "bad"? What’s going on in there?!
Any recommendations for where I can get the prescription filled, somewhat inexpensively?

You do need glasses to sharpen your distance vision. The correction is for both eyes, however, your left eye has astigmatism, which has to do the shape of the eye and how light reflects of it. You will definitely notice an improvement and "sharpness" in vision with glasses and I would definitely recommend them for driving.

The prescription is for single vision glasses as opposed to bifocals or trifocals which would have both distance and reading correction.

Your vision isn’t super "bad", but you may not see well enough to pass a driver’s vision test. You should be able to see the numbers on the bus clearly with glasses.

For getting the presciption filled inexpensively – many Walmart and Target stores have Optical departments, also lots of chain Optical centers such as Lens Crafters often have special prices.