a couple of novice questions

[Mitch Edelman]

apologies for newbie question - using Xemacs (for windows)how does one 
display the line number of the file currently being edited?

Secondly, how does one find a matching opening brace, paren, etc?

Finally, in editing a document where it's reasonable for "<" to
be unpaired (as in javascript code inside an html document), how
does one find the opening prace, paren, etc.

Thanks in advance,

Mitch Edelman