First you could start to use punctuation and separate your questions to make your post easier to read.
Then you could go
here and read the page, you'll find the very basics about rpm there.
Basically you need to be root, and know 3 commands to start
Code:
rpm -ivh packagename.rpm
installs an rpm package
Code:
rpm -Uvh packagename.rpm
upgrades an installed rpm package
removes an installed rpm package
After that you could go and read
the rpm howto
It teaches you all you need to know and more about rpm.