You can go into any Home Depot, Lowes, Menards, etc... Any of the big box stores and get the cable and the connectors, along with an installation tool.
Don't get the crimp on ones, get the compression type connectors. The tool that presses them together is only about $10 at my local stores, the connectors are about $1 a piece in a ten connector pack.
The cable can be bought by the foot off a spool or out of a bulk box, depends on the store. I bought some RG-11 to redo cable tv stuff in a house about a month ago, cost was about $.30 a foot at Menards.
If you prefer you can get a stripping tool.. But its easy to do with a knife, i use a utility knife, its 1/4" of center conductor showing, then 1/4" of braid showing. Check the package of the connectors, it usually shows the stripping dimensions needed for them. Get the tool now and your ready for the future installs!