Coupon creation

Hi, we are currently testing Hika Shop and are impressed so far.
We will need to buy the Business edition because of better email configuration.

I have some pre-sales questions:
1. We do sell membership. Evrey new member get a unique coupon which can be given to friends.
Is it possible to define coupons incl. the propierties in excel and import the definitions from a CSV file?

2. For each coupon used in the shop, the member to whom the coupon is assigned get one month membership credits.
At the time the membership needs to be renewed the member get a coupon to use.
The idea is, we define special memberships ( 13 month, 14 month ... 48 month). This special products are
shown on a protected page and only members allowed have access (managed with an extension).
the member select the membership duration and use a specific one time coupon.
Question: is this process feasible? Has somebody a better idea to achieve our goals?

3. We sell 2 products: membercards and vouchers (gifts).
Is it possible to require the registration in the checkout if one buys a membercard, but not if one buys a voucher?

Thanks for answers
Markus

Great Nicolas
thanks for your fast reply. 1 and 2 are critical,
3 would be nice but we can work this way.
regards Markus