MyBB Community Forums

Hi guys i have a mybb forum backup and i would like to  work with him some hobby stuffs, 
can you tell me how can i install a backup ? and where i could  host it  ,  i would like to try it free.

update: So my back-up is was named mybb.36_92782.2016-03-17_20-00-00.tar , i want to know how to instal this with xampp and to know if thi sis my whole forum or just the structures without databasea and without the mybb installed on him ,

what is size of your backup tar file (approx) ?
can you post a screenshot of its contents (sort contents with size descending)