Welcome to this forum sanmonei!
I suggest that you read the "Survival guide
" of this forum, it gives clear advices about posts: only one question per post, meaningful title, don't put your e-mail in the message, etc.
In Draw, use the menu Format > Page, then select landscape.
I don't know what you mean by "so many features unavailable". This is most probably normal if you have no object selected, as many features are activated only when you have a proper object selected.
It is not said anywhere on OpenOffice.org that OOo is compatible with Microsoft Office 2007. It is said that OOo can open and save files in Microsoft Office 2003 format. Also, the equivalent of PowerPoint is Impress, not Draw. Try with this tool and if you still face some issues, let us know.