I can answer some of your questions, I have been a resident of the island for 12 years.
What is the present crime rate in Coz and how often are Retirees and etc from other countries affected by said crimes?
Compared to NOB (north of the border) Cozumel is doing pretty well. There are crimes of opportunity. Home burglaries, purse snatching, scooters thief. The expat community is not exempt from these types of crimes, but in my opinion they are also not targets.
The police have a Facebook page if you want current information on what police action is going on:https://www.facebook...242?ref=profile
What is the "seasons" like as far as temperatures go? do the homes for sale in Coz have central heat and cooling or separate units?
Right now we are in low season, and higher temp's, and humidity. The average at my casa has been 90 degrees. It can get "cool" in the winter months, but houses here do not have central heat. You most likely would not rent a house (that you would want to live in) that does not have AC. Mini-Splits are popular here, and more cost effective.
*your largest expense will be your electric bill if you run your AC 24x7. It could easily be more then your rent. So, my suggestion is that you use the AC in the evening, and have ceiling fans on during the day.
Are the foods you find in the grocery store(s) similar to the ones we find in the states or not?
Cozumel is missing some of the comfort foods you may be used to NOB, but these days you can find a great deal of what you are used too.
We know we will need to "learn the lingo" but is English understood and spoken a lot in Coz or no?
English is spoken in the tourist areas. The grocery stores will have someone who can speak English most of the time. The need for Spanish really comes into play when you need to engage with the local population, and merchants. I have gotten by with limited Spanish, but it has not always served me well when trying to purchase nuts, and bolts, or answering the phone. Learn as much as you can to get by.
Im am also a classic rock-classic country & new country drummer/vocalist - are there any clubs in the area that have this kind of music as I want to continue performing as I have been in our home state of Oklahoma
Rock, Jazz and Cuban music seem to be mostly what I hear. However, it sounds like you have many skills and can find a gig to jam with. Check out Wet Wendy's, and Woody's for starters.
Would driving our car thru mexico from Juarez to Coz be an advisable thing to do, or should we consider buying one locally?
If you're coming on a tourist Visa, you can stay for 180 days. You can drive your car down (with international insurance), but you and the vehicle must exit the country at that time.
If you want to apply for Temporary Residence you can stay and renew annually, and you can drive your foreign plated vehicle. The car plates must be current, and you need to purchase international insurance. *The process for TR, and PR must be applied for in your home country.
If you apply for Permanent Residence, then you have a choice. You may be able to import your vehicle (runs between $1,500-$2,500 or up) depending on the age, and where the car was manufactured, but if you can not import it, you LEGALLY CAN NOT DRIVE A FOREIGN PLATED CAR with a permanent residence status. It will be at the risk of having the vehicle confiscated.
Next questions to put on your list are: health care, and medical insurance, and cost of living.
Take your time, ask lots of questions before you pull the trigger. It is an enjoyable lifestyle, but you are also moving from everything you're familiar with. Lots to think about.