Develop a program using JavaScript to display all the properties of a given object Example object:
var student = {
name : "David Rayy",
sclass : "VI",
rollno : 12 };
Your task is to enhance this program by incorporating typing, optional arguments, and default values using Typescript.
covering various types and potential arguments
Diverse types and alternate components. For illustrative purposes:
let person: {name: string, jobTitle: string, age: number, otherInfo?: string} = {
name : "Jennifer Smith",
jobTitle : "Manager",
age : 28 };
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