It appears that the answer is yes.

Put a list of your expenses, because those are in fact your expenses.

Can I travel to US on B1 VISA if H1Visa stamping taking time for processing?

If you can demonstrate that your trip to the U.S. is in keeping with the B1 visa, you can do it.

Is it possible to obtain a student visa, while there is an I-130 pending for around 3-4 years?

If you can persuade the US consulate that your visit is temporary and you intend to return to your residence outside the U.S.

Can I do military service to reduce time to citizenship if I'm a PR?

Yes.

How long does it take to receive the working permit after I send out my I-130 and I-485 for spouse.

If you filed an I-765, then it takes 90 days. If there is any request for additional evidence, the 90 days stops and the card won't be issued...

I recieved the I-797 back with a reciept number notice date 10/26 but when i plug in the number in the immigration site to check

Depends what type of application it is. Some applications will get new receipt numbers, such as I-751's. Others cannot be searched, like N-400's.

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USCIS Cases With Officer?

I most likely identifies the CIS officer who composed the email.

When you are ready to get married, you can file a fiance visa. Alternatively, invite him to your graduation and let him apply for a tourist visa. ...

If he entered without permission, most likely he must return to his country to immigrate. Speak with a lawyer, all of the facts in his case are...