Depends on the RV dealer but most give a starter kit. These usually have a slinky refuse hose, a water hose and maybe a full tank of propane. Your RV will have the proper electric cord with it. You might like to purchase a water filter, a water pressure regulator and some blocks for leveling the TT. Others will suggest more but start simple and add as you gain experience.
Life time Good Sam Member
Blog: My RV
5th Wheel Blog
Full timing isn't "always camping". It's a different life style living in an RV.
You should get everything you need to use the unit. However, the hoses are short, thin, and cheap. they should show you how to use all outside hook-ups, water, drain (black & grey), electrical. You will see what you have when they do. Depending how you camp, dry, partial hook-ups or full RV service you will need some of the following. Longer electrical cord (we carry min. of 50'), possibly and extension to the sewer hose along with several different attachments, longer water hose (we carry 100' of regular hose plus 50' of a collapse-able), and some type of leveling blocks (we have 4 bags of the orange links). this is probably only a starting list but should give you some ideas.
Mike & Dava
2007 Sierra Classic 2500 HD Duramax/Allison 4X4 Crewcab, Super Springs
2005 Carriage Compass 30RLS, MOR/ryde suspension & Pinbox, Onan 3600LP
Huskey 16K EZ Roller, DigiTrac
If you are buying new (don't do it, but I digress), the TT should come completely equipped for you to drive off the lot and camp. Two batteries, two propane cylinders (full), chocks, sewer and water hoses and leveling blocks would be the bare minimum. Be careful that these items don't find there way into your loan or cash price at greatly inflated prices. On all but the smallest trailers a good quality WDH and brake controller (installed and set up properly for your TV), should also be part of the "complete" package. If a dealer balks at giving you what you need, walk away as there are many who will be happy to earn your business with a complete package.
A lightly used trailer (one to 3 years old), will likely come with all of the above and probably a good deal more. The minor bugs will have been fixed and any glaring deficiencies will stand out. You will save 40 to 50 percent over new and if it turns out to be less than the trailer of your dreams, as is often the case especially for first timers, you can probably sell it for close to what you paid. With a new trailer that doesn't fit (so to speak), you will have eaten 30 to 35percent in depreciation another 8 or 9 percent in taxes plus the additional costs of registration, insurance etc. The internet is your friend.... good hunting!
Bag of bathroom accessories with screws so you can put them where you want or not at all, drinking-water hose and pressure regulator, waste fittings and flexible corrugated pipe, electric cord if it's not attach to the RV, owner's manual and all the paperwork on every attached item/appliance, battery(s), LP tanks, hand cranks for slide room and awning(s) if equipped, spare tire, the tools for hitch (if equipped). For someone new it would be nice to get a factory DVD walk-thru. I got soup bowls and instant soup as a GIFT!
Mine is made by Forest River...so mine came with lots of problems due to the sorry workmanship by Forest River...thankfully my dealer has repaired the mess that Forest River made when they tried to build the unit.
2002 Honda Goldwing