"Which would you suggest for a first Serious seeds buy for Indica plants?"
Chronic and White Russian are the two indica dominant choices. Both are great stones, Chronic will yield more, White Russian will smell more during flower, Chronic will be a Cannabis Cup winning stone but White Russian will be more potent, both are 8-9 weeks flowering.
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And why?"
If you have excellent odor control either, if not Chronic.
"How many are in a pack?"
1 or 11.
"Doesn't say Fem."
Serious doesn't offer feminized seeds, they're less stable than regular.
"or how many are in a pack?"
1 or 11.
"Anyone know?"
Yes.
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Idea!
Rather than buying 1 x eleven pack of one strain buy 5 seeds of 2 strains from Pick 'n Mix. 5 seeds gives you a 96% chance of getting at least 1 female. You can take cuttings and make clones and have the 2 strains for years.
I've got Bubblegum (6 weeks) and Kali Mist (2 weeks) flowering. Bubblegum is incredibly easy to grow, smells great, good yield, potent. Kali Mist is the ritz but takes 13 weeks to flower while Bubblegum takes 9.
http://www.pickandmixseeds.co.uk/collections/serious-cannabis-seeds
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