@Shyluck , if ikakasal na kayo before submitting Eoi mas ok yung married name mo na ang gagagmitin. If hindi naman, you can still use your maiden name. And you can just update it during lodgement of visa, dun kasi kelangan magattach ng required docs.
As for requirements ng spouse, mostly personal info like passport, birth cert, marriage cert, nbi. They might require for proof of functional english, pinakamadali is magrequest na lang ng certificate from his school stating that the medium of instruction is english. Unless gusto niya magtake ng english exam, mababa lang naman yung required points. .