Anspress Theme customization

Hello,

After I purchase the theme, can I customize? for example, there is ‘Top Users’ section in the front page so can I delete that?

Also because I am thinking Q & A will be one section within my site,

so if I use wordpress for the whole site, if I apply this theme, that will change the whole site?

I mean do I need to set up separate wordpress site for this section (menu) ?

Thank you.