I was wanting to buy Morrowind for my PC, I've only ever played it on Xbox, but I wanted to know if I can use mods on a Steam purchased Morrowind. I don't care about making my own mods, just using mods other fans have made. Can I do that if I download it from Steam?

Yes, definitely. I have a heavily modded steam installation myself. The only thing I've had to do is to re-date the BSA's to the original non-steam dates.

Yes, sure you can

Good that was my only major concern, thanks.