We are getting married in Jamaica. Do we get our marriage license there or here in the Dallas/Ft. Worth area? Also, can we set up our checking account now styled with both our names?

You will have to check with your contacts in Jamaica who can help you on the paperwork (and license) necessary to marry there. You wouldn't get it in Texas. Some people find that the paperwork and residency requirements necessary to marry out of the country is more than they want to deal with and actually marry in a small ceremony where they live here and then do a second, renewal ceremony at their chosen location (which doesn't require the paperwork, since they are already legally married).

You should be able to set up a joint checking account before the wedding and have whatever names you want printed on the checks. Check with your bank for account setup details.