Create BLOG and NEWS/EVENTS admin sections and integrate into Bootstrap front-end

I have a Twitter Bootstrap site which has been been designed using a paid for template. I now need to create a fully functioning blog section complete with all usual blog functions (tags, latest posts etc) on the website. I also have a "News" and "Events" section on the website and need a backend admin section to create the posts which will populate the news and events sections . Please let me know what system you propose to use when bidding. Thanks.