ANYTHING you download to your system can carry a virus, or other nasty things. Toolbars are notorious for placing all manner of things on your system for various things other than the toolbar itself. These can be keystroke loggers, trackers, re-directs, and far too many others to list. It is my personal policy to avoid 'third party' toolbars/search engines like the plague.
This does not mean that you have been infected with a virus, much of the garbage a toolbar typically infects your system with is malware that is not truly a virus. You NEED to run some programs (available for FREE) to identify and clean out the trash you have been 'gifted'. It sounds like you really are not all that knowledgeable of this area of computing (no offense) so I will suggest one very good free tool for you to use. This is malwarebytes. You can download this jewel from a lot of sources, but if you are paranoid I suggest going to cnet.com download area to get it. (cnet.com is known to be a virus/malware free download site) malwarebytes is NOT an antivirus program, and frankly I can't really define exactly just what it is, it is unique in what it does, and I know of no other program that does what it does. Anyhow, download it, run it (it might take some time to run the first time depending on how much trash you are carrying). Once it finishes it will identify the nasties you have and give you options options to deal with them. If you are a little uncomfortable in deleting things that you are not sure of that malwarebytes will ID on your machine, then use the option to at least quarantine the ones you are not sure of.
There are a lot ot other steps you can and SHOULD take but this will probably get you to a much improved state.