Homepage changes can be the result of installing something and not noticing a sneaky tickbox that you would have been well advised to untick, which then installs stuff you weren't intending. If so you can use the browser options menu to return the home page to the one you wish.
Toolbars can usually be switched off by right clicking on them and deselecting them. Do uninstall one would probably mean going via the tools/addins (or equivalent) menus.
However I'm suspicious about the rest of the problem, pop-ups and suchlike, which suggests to me a scan for malware is a good idea. Try www.superantispyware.com/ and www.malwarebytes.org/