Do I require to spend bucks to activate my Roku device?

No! You will not be asked for any bucks to activate your Roku device. Once when activating your Roku device, you can receive an email or call that looks like coming from Roku, requesting a payment to install the device. Contact our technical support squad for more information or doubts regarding my.roku.com and Roku.com/link  @ +1-855-592-3030

And Roku will never charge for any activation price or any supporting chargers, and in case if you get those, then we call it a Scam and not authorized messages from Roku. Roku will never ask for the below:
 
At first, it will not ask for your computer access. 

Or It Will Not Ask For The Social Security Number Of Your Date Of Birth. Secondly, It Will Not Prompt You For Any Password Of Your Computer Or The Roku Account. Never Suggest Buying Any Sort Of Anti Virus Software. Installing  My Roku device and linking it to the Roku account!   
Proceed with the following guidelines to set up your Roku device and the Roku account:
 
Firstly, you have to set the device and get the code for activation. 

 Connect the HDMI cable and Power Adapter To The Device. Power It Up And Then Start The Roku Device. 

Secondly, Set The Language, Display, Theme, Etc. 

After That, Connect The Roku Device To The Network And Let The Device Update To Its Newer Version. 

And now, you will receive the Roku code. The TV Screen On. 

 Moreover, Note This Code And Visit Roku.Com/link. 

Key In The Roku Code For Activation Into The Text Box. 

Similarly, Sign In With The Roku Account Using The Credentials.

If You Don' t have one Roku account, make sure to create it via my.roku.com. 

Give all the info that is asked in the form and get your account.  

Finally, click the activate button to activate the device and link it with your Roku account.