For the first-timer, yes; it gives you security in case you can;t do it and will make the bank more likely to consider you. For the cosigner, you better make sure you can keep your word as well.
Yes. That's the idea.
No, although if you're buying them for resale it's probably a good idea to get tax-free status.
No, you aren't obliged to inform the buyer that you have dispatched their item but it is good manners to do so. Letting your buyer know that their item has been shipped will also help to give them some idea of when they can expect the package to arrive.
Yes. But for now the lender has you and will get their money from you as they would the primary borrower. Cosigning is a really, really bad idea. At least for the cosigner. Everyone else seems to benefit.
You sign the title where is shows seller and fill in the information of the buyer and have them sign as buyer. Its a good idea to make a copy of the title (front and back) just in case the buyer doesnt title it right away so you can prove that you sold it if you get a tax notice.
is it a good idea to send small children to daycare for the first years of their lives
FAIL!
If you have a Mechanic friend or family member, it can be a very good idea. Most used cars are sold "As is", and the general rule of thumb and law is "Buyer Beware." This means you buy the car as it is, with no promises or guarantees. This is why it's always a good idea to have a knowledgeable friend or family member inspect the car for you before buying it.
No. The car is not your property, nor do you have legal authority to sieze property. It would be considered grand theft. As a co-signer, you agreed to be just as legally liable for the debt as the borrower. That's why it's a good idea to NEVER co-sign ANYTHING.
How desperate are you to sell? It all depends on what is being asked, how much it will cost and whether you think the next buyer will make those same demands.
Probably not. You, like the primary party, signed a contract as an independednt, free-thinking adult. It is assumed under the eyes of the law that you knew what your were getting into. You are as bound by contract law as the primary.
a good idea is learn to spell first