No. Maybe this will be added later. You can download extensions though.
Google Chrome adds additional functionality by using what it calls "extensions":https://chrome.google.com/extensions/?hl=enFor bookmarking, I find that using a third party service that...
yes you can!
I haven't found one. There is an Answer by Answer.com extension which allows tho look up words straight from a text on another website.
In google chrome their isn't toolbars but, their is extensions, https://chrome.google.com/extensions/detail/dckheglehcdhpjkdmmmghbgkcdebhhae?hl=en