In Texas, a suit may be started by filing a Petition, which is also known as a Complaint. (you can't file a motion to start a new case). That petition has a number of specific requirements, such as those you just noted.
There are also formatting requirements for a motion, but they are different. You'll want to put the name of the court at the top, along with the case number. Then, you put the court caption, which is the names of the parties - you'll see the format for the caption on the other documents. Then, underneath, you'll put the title
of the motion. Rule 21 of the Texas Rules of Civil Procedure
states that a motion "shall be filed with
the clerk of the court in writing, shall state the grounds therefor, shall set forth the relief or order sought, and at the same time a true copy shall be served on all other parties, and shall be noted on the docket."
That link is for the entire Rules, but you'll just want to look at the general provisions at the top and the rules of the specific court you are in. Let me know if you have any other questions.