160 points without any upgrades
A space marine scout bike squad is 70 points
Space Marine Tactical Squad (includes 10 Space Marines) Space Marine Combat Squad (includes 5 Space marines) Space Marine Rhino Space Marine Scout Squad (includes 5 Space Marine Scouts) Space Marine Assault Squad (includes 5 Space Marines).
its 40 points per model meaning around 200 points for a squad of 5
A space marine battle force consists of 1.Rhino/razorback 2.10 tactical marines 3.5 Assault marines 4.5 Scouts ---------- Depending on how armed, it can add up to roughly 500 points
5 Marines = 90p. Each additional (up to a maximum of ten) costs 18p. + weapons.
Yes you can.
You will essentially need to buy the current Space Marine codex, available for about £12 (or however much that translates to in your particular currency). This will list the details of every unit you have in your army, including the points. For example, i have a Space Marine tactical squad- this is a base of 5 models for 90 points, with 5 additional models at 16 points each (according to the current 2009 Space Marine codex), bringing the cost of the unit up to 170 points in total. The wargear you have on your army will also affect the points cost- for example, a squad of 10 space marines can have a flamer and missile launcher for free, but equipping one with, say, a lasgun will increase the points cost. just look through the entries near the back of the codex for the points of every model you will be using, the cost of any extra options are also listed clearly there.
Read the codex
6 or 7 I think.
This is entirely based on the weapons you give them and how large you want the squad to be. They're 20 points a model and you can have a minimum of 5. Leaving you 100 points of Assault Marines, if you want more they cost 18 points to expand on I believe.
You must take 3 models as minimum, 1 Sergeant and 2 Space Marine bikers, which costs 90 points. You can then add up to another 5 more, which costs 25 points per model. An attackbike, of which you can take one in a bike squad, costs 40 points.
No he keeps all his current statlines and weapons etc and any special rules that he can confer onto a squad he does(fearless and fleet cannot be added as he may be fearless but that squad is not so as he is part he has to take tests too).