Is their appeal time after the notice of opposition to claim of exemption hearing?

Because the law allows time for an appeal.

I have had a judgment against me since 2007 A few weeks ago I received a letter from a different collection law firm..

I agree with Mr. Peake's excellent answer.

I am currently being sued by cavalry spv I llc, i have entered into a settlement with them. Do i have reason to file a MTD?

I agree with Mr. Hemert's excellent answer.

Does statue of limitation apply.

A payment on a debt restarts the running of the statute of limitations.

I just received Debt Collector's notice that I owe Motor Vehicle Tax in Waterbury, CT from 2005.

In addition to the other answers, you may want to speak with a consumer protection attorney; there might be violations of the Fair Debt Collection...

Worthless check written and deposited in Wisconsin, I live in MN and need to collect

It probably isn't a criminal violation. You would need to file a civil suit in Wisconsin.

Can I ask potential a roommate to pay for a credit check?

Unless prohibited by local or state law (and I don't practice in Virginia), you may charge. You might want to check with a local landlord-tenant...

Can i serve the supplementary process proceeding to the defendant work?

If you know where the debtor works, you can garnish his wages. You do not need a SSN.

My ex is filing bankruptcy - how will that affect my monthly child support payments? Does the impact change if he is employed?

The bankruptcy won't impact child support; it is non-dischargeable and must resume once he has filed or his case won't last too long. Arrearages...

Your facts are somewhat unclear, but garnishments typically work where the employer withholds wages and sends the appropriate amount withheld...