GuruBlue, thank you very much for telling me about popular clothes in America. What does the word "bill forward" mean?

Question

Can you please tell me if I made any mistakes in describing clothes? I'm typing you the sentences again. Thank you in advance.
1)I don’t like following the latest fashion. I usually buy cheap, loose-fitting clothes.
2)I like wearing trouser suits (or pantsuits), baggy trousers, striped long-sleeved polo sweatshirts (or long-sleeved polo sweatshirts with stripes).
3)I usually buy my clothes at a clothes shop/at a big department store/at a boutique/at the market (where else can you buy clothes in America?) near my house. I have never bought second-hand clothes (?)
4) At the moment I’m wearing a pair of tracksuit (sweatsuit) trousers (or bottoms?) with a checked hooded zip-up (is the adjective order correct?) sweatshirt over it. I’m also wearing a white T-shirt underneath (or under the sweatshirt)
5)I don’t like wearing stilettos (high-heeled shoes) or leather boots.
6)I don’t like wearing turtle-neck jumpers (or sweater) or a skirt and a jacket.
7)I prefer Velcro (?) shoes to lace-up shoes or moccasins (what are slide-on shoes?)
8)Could you tell how to get to the cinema from here?
9)I do (or go) scuba-diving/snorkelling
10)Are the following expressions correct if you want to ask for the way to a certain place: “How can I arrive there? “How can I get ther? /Do you know how to get there? / Do you know how I can get there?/ Do you know the way to get there? Do you know the way to the post-office?
11)Were you having lunch when I rang you (I rang you up, called you up, phoned you ) are they all possible?