1- How can I make an input of lammps using charm-to-lammps in windows?
2- I use an potential (for example tersoff), that does not consist of all parameters for atoms of my system.
How can I obtain all parameters for atoms that there are not in a potential?
The charmm2lammps tool in ch2lmp is a perl script. This works on Windows provided you have a program that runs perl scripts (not included by default in Windows).
However, you will still have to download the tarball (and a program to open it because standard Windows programs will not) to obtain the tools directory because they are not included in the standard Windows install.