you can go backwards
Very good
Yes, I do. It really makes your skis so much smoother and if you're a freestyle skier like I am, it helps to land a jump without all the pain when you land. If you wax your skis once every time you go skiing that is the best way to do it, but you can also just make your own waxing plan.
For adult Elan Twintip skis, $200 is a very good price.
any cheap, all mountain skis would suit a beginner nicely.
Check out the article in the link below with some great videos on all of the different types of skis available. It does a good job explaining what kind of skis to get.
It really depends on the ski. Rossignol makes a lot of good racing skis (not so good for powder), but they also make a few skis that are good for powder. If a pair of skis has twin tips, than it will almost always be good for powder. On the rossignol website there is a little meter for each ski that tells you some of the specs of the ski and what kind of conditions that ski is then made for.
Back country skis can be purchased at most sporting good stores that sell skis. Some good back country ski equipment brands include Mammut, Backcountry Access and Voilé.
I have found that some good websites for buying cross country skis are skis.com, xcskishop.com, orscrosscountryskis.com, etc. These are very reputable websites for skis
A good beat to freestyle to is Lil Wayne ft Cory Gun 6 foot 7 foot
Better to have both with good condition
No, the plural form skis is a regular plural for the singular noun ski. A regular plural is a noun to which an -s or an -es is added to form the plural. An irregular plural is plurals formed in some other way.