Linux Mint does not knowingly distribute or install adware, spyware, or other malware. As much as possible, Linux Mint distributes and installs open source software, and from authenticated sources. For some things there are no good alternatives but closed source software, in which case Linux Mint compromises and distributes and installs that.
A fresh installation of Linux Mint will have a selection of programs, generally one for each common task such as a web browser, a file manager, an office suite, and so on. These programs are selected as sensible defaults, to have you up and running out-of-the-box. These are fully functional and free software. Should you have a preference for another program, you can easily install that if you so desire.