Illiterate by far. No more reading your posts

Assuming you were completely illiterate it would VASTLY limit your interaction with the current world and ability to work than having no legs.

I am not even sure it is a contest here. Having no legs would absolutely limit my physical mobility but there are accommodations and workarounds for that. I can 100% do my current desk job with no legs, play online games etc.

Being completely illiterate would heavily isolate you and your ability to grow and learn. You would have to be verbally / visually be taught everything yet somehow not ever learn how to read or write?

Learning to read would be easier than getting new legs, so I guess that be the better choice