This is a standard model for subscriptions, you create a number of subscriptions plans. An ideal number is 2-4 different plans. The plans are priced low to high and the price is directly related to benefits you apply to the plan.
Benefits could include but are not limited to;
Skype/phone (or other) Consultations eg (1 x 30 min Skype per month)
Automated Training Tilt benefits
Access to resources (tips, videos, articles, downloads)
Access to workout library (by checking the allow member access check box in the workout library)
Chat and Social groups
Access to Template Training Plans (access to x number of Training Plans)
Product Discounts (by creating custom page in TT and adding your affiliate product discount codes with the page editor tools)
Discounts on Training Plans (via member only discount configuration of products)
Discounts on other Products (via member only discount configuration of products)
A typical pricing set up for 3 different tiers might look like this. How you actually decide on prices will depend on demand for your existing services, the size of your current audience and your perceived level of "authority" within your audience and compared to your competitors. The pricing here is indicative only and could vary greatly depending on those factors. The important thing is getting the balance right with the difference in pricing between each of the plans so they all provide a similar value. And always remember "Price is what you pay, value is what you get".