What files are needed for backup

Question

Hello all,
Our database stopped working because of a mistake and we've lost lots of our control files and configuration files.
On the other hand there are 5 oracle_homes in our system! So we decided to uninstall Oracle and install a clean version and restore our data, tables, triggers, functions and ... to it.
We have many rman level 0 and 1 backups since 2 months ago and the size of each level 0 backup is around 1.8 GB.
But I am new to Oracle, so please let me know which files I need to keep from our current Oracle before uninstalling it and how I can restore backups to the new oracle (probably I will install it in a new drive not in D:/ again and with a new SID maybe). Also please let me know which version I should install? (Desktop Class or Server Class) We have some applications on our own laptops which connect to server and retrieve/insert data from/into oracle database on the server.
Our current database does not mount and open because of the problems I mentioned above.
Our server is: Windows Server 2008
Oracle Version: 11g
The scrips the we used to create rman backups are:
echo database backup, level 1
echo %DATE%
echo %TIME%
set datetimef=%date:~-4%_%date:~4,2%_%date:~7,2%_%time:~0,2%_%time:~3,2%_%time:~6,2%
echo %datetimef%
rman target / @F:\backup1.txt LOG F:\database-backup\rman-logs\%datetimef%.txt
copy F:\database-backup\rman-logs\%datetimef%.txt F:\database-backup\rman-logs\current-log.txt
and
echo database backup, level 0
echo %DATE%
echo %TIME%
set datetimef=%date:~-4%_%date:~4,2%_%date:~7,2%_%time:~0,2%_%time:~3,2%_%time:~6,2%
echo %datetimef%
rman target / @F:\backup0.txt LOG F:\database-backup\rman-logs\%datetimef%.txt
copy F:\database-backup\rman-logs\%datetimef%.txt F:\database-backup\rman-logs\current-log.txt
Thanks

Answer 1

RMAN's BACKUP command supports backing up the following types of files:
Database files, including datafiles, control files, and the server parameter file (SPFILE)
Archived redo logs
Other backups created by RMAN, including such as datafile and control file image copies, and backup sets containing SPFILEs, control files, datafiles and archived logs
Check
http://web.njit.edu/info/limpid/DOC/backup.102/b14192/bkup001.htm