Hi @gaurav_kd606277 ,
I know of no limit to the number of profile variables or profile scripts you can add to Target. However, for profile scripts in particular it would be prudent to only setup scripts that are needed. As each script that is active is run each time a request to Target is received. Running more scripts can in theory take more time, so I personally like to write my scripts so they only run fully when I need them to, and if they aren't being used I deactivate them until they are needed again.