Hey there, and welcome to the forums
That's a nice TT your picking up. We got ours in April and have been having a great time with it and love it.
The most important tip I can give you is to do a thorough inspection at the dealer of all systems and take a look at everything you can for defects. Its easier to find out issues before you take it home and start camping.
My water pump failed first time using it, but luckily it was in my driveway while I was sanitizing the the fresh water system and not while camping.
Check the following for sure:
Fridge (both electric mode and gas mode)
Outdoor fridge and Coleman stove (if equipped)
Radio/DVD (check that all speakers are functioning)
All electric outlets (bring a polarity tester is you have one)
Battery/Tank Monitoring system
Check under sinks and trailer for leaks while water is running
Look under the trailer at the axles and springs. Make sure there is a nice arch on the springs and that he axles don't look bent. ( the axles should have a slight arch up in the middle of them and NOT be totally flat).
How I know this because I noticed my springs where squeaking and flat as a pancake after only a few trips and about 400 miles.
As for equipment, buy a wheel wrench and bottle jack as the TT does not come with one because with the el' cheapo
tires the mfrs put on, you'll never know when you'll need it.
You will also need wheel chocks and probably something to level the trailer on uneven ground (like 2x6 and 1x6 boards or levelling blocks).
The rest of the equipment you need for camping will be up to you really, and that is part of the fun starting out. You'll have your D'OH! moments when you realized I should have brought.....
Oh ya a few basic tools come in handy for any needed repairs on the road.
Most of all have FUN